I am not sure why a larger landing craft would be less likely? Its hull is similar to a LCI(L) from what I've read and for war games and dioramas, having support craft for an assault seems like a desirable thing?
Some links.
Museum:
The Landing Craft Support Museum
Association:
index.htm (also has lots of links and book suggestions)
While trying to find drawings, I found this article discussing how they were developed.
https://erenow.net/ww/american-amphi...-pacific/2.php
The best 3 side view I have found thus far.
The Pacific War Online Encyclopedia: LCS Class, Allied Landing Craft
Seem to be in a game now!
https://warthunder.com/en/news/5584-...ghty-midget-en
A 3D model to look at:
https://sketchfab.com/3d-models/land...d124655affdfc6
A 3D printed model.
https://www.shapeways.com/product/3D...li=marketplace
All these various models make it seem there must be more drawings out there somewhere.