Place to buy/order inflation suits?

On the latex side of things, and somewhat generally:  Thing that you should consider first are: how important is the outer appearance/shape? how important is the feel (being mostly pressure)? accessories ( attached/removable gloves/hoods/sock/boots, zipper length & position, number of zippers/sliders, access holes, etc.)? getting a sacrificial non-inflatable latex catsuit also?  Having a sacrificial catsuit, to wear underneath, can help increase the life of the inflatable suit because it'll have reduced exposure to skin & hair oils.  Attached gloves/hoods/socks could be considered a failure point during dressing, increased wear, or increase exposure to oils.   Thick latex won't stretch much and will provide much more restrictive and compressed feeling.  Not to say you can't wear something restrictive ontop of a thinner suit to achieve the same feeling.  If you plan to wear something outside of the suit, I recommend getting a cheaper suit.... in case inflatable suit rips cause by outer clothing.

Sealwear: As an example of their work, https://www.sealwear-shop.com/collections/catsuits/products/mega-inflatable-catsuit?variant=43087540805 .  There are picture from Fetisheyes for how it looks modeled.  They have a couple other inflatable items and have pictures under their "rubber engineering" service.  One thing notable is the shape of the "mega Inflatable Catsuit" is different from other "basic" (before getting in wild shapes or animals) inflatable catsuits.  This is the place i want to get a suit from.

demask: https://www.demask.com/shop/ . They have a fairly wide selection of inflatable catsuits and addons. example modeled pics: https://www.catsuitmodel.de/2017/09/12/katya-voll-verpackt/

MD-latex: https://www.md-latex.eu/ .  It looks like they do a lot of business on ebay.  From what I've read and can see, their suits tend to be very unique in appearance, very thick, very heavy, and also very restrictive because of the thickness. modeling pics: https://www.catsuitmodel.de/2018/09/17/melody-in-sehr-viel-latex/ .

cocoon: http://www.cocoon1.com/infs.html . Another shop.

https://www.studiogum.com/heavy_rubber/   I've read good things about them.

latex catfish: http://www.latexcatfish.com/xcart/home.php .  It seems like a lot of people them, but there's also concerns about them.  I'm not sure if it old info and have improved since then or is FUD.  Some people really like their work, others not so much.

others to mention:
http://latex.moscow/ca4050-latex-inflatable-suit-novitchok-unisex

http://www.scaleworx.org/suittype/rubber/

https://www.blackstyle.de/lshop,showdetail,1542322192-26247,e,1542322218-26434,,260100500198,,0Tsuche--inflateable,.htm

https://www.twistmyrubberarm.com/index.php?info=prod&code=F261&k0=her#2  based on the picture, they are likely a reseller of a suit (which a few other sites do) such as:  https://www.latex-maske.com/shop/Ladies/Catsuits/Catsuit-for-Ladies-inflatable::1029.html  .  I believe the true maker is: http://www.latexa.com/produkte/index.php?pid=535 .

https://www.rubberevashop.com/inflatable-rubber-catsuit

https://www.latexus.com/pages_aufblasbar.html

I would stay away from most ebay (ignoring MD-latex & individual people) shops , mostly chinese, as many of them take pictures from demask (notably their inflatable suits and dresses) or from Latexa which is a red flag in my opinion.  Some designs are copied exactly from Demask also (like inflatable dresses), in that regard, I would rather spend my money at the place that designed it, not the place that copied it.