Hmmm....I got curious as I've never heard of a thin body acoustic.

So....I did some perusing and this page has several scattered around.
Brands I haven't heard of and a couple Yamaha, Sigma and Ibanez.

This is probably little help other getting purchase price familiarity:
https://www.amazon.com/s?k=thin+body+acoustic+guitar&crid=2XGJ0M5RE077Z&sprefix=thin+body+acoustic+guitar%2Caps%2C1151&ref=nb_sb_ss_i_1_25

Spend well....happy hunting.