Mr Blowup

From eurotrash.

Supersized Inflatable Latex Catsuit

Just took delivery of a huge inflatable catsuit. What a fab product inflates bigger than any I’ve had before, it was going to be sold, but I’m gonna keep this one.
It’s 0.4mm latex inside and out, and it’s made for the biggest inflation possible. we can make one to inflate however big you want! [...]

Inflatable suit fetish in a book?

Not in your “normal” adult fair, but in a mainstream book.
Facetime by Winnie Salamon contains a character with an inflatable suit fetish.
Click here for an excerpt from Google
It’s also available on Amazon.