Restrict Template or Category from Displaying at Site Creation

Hi -

I'm using Gravity Forms to register new subsites, which does display new blog template selector.

I'm trying to figure out how to have different pricing for different templates.

In lieu of having one form with variable pricing by template (preferred) a workaround might be to somehow filter the templates by ID or by category (preferred) and have a separate different form for each different new blog template category.

Q: any ideas on how to display templates only by certain category?

this would solve a whole lot of issues and is worth digging in a little bit - since the categories have a selector, I'm guessing there might be some kind of conditional that could be applied - or write for each ID, thinking somewhere in the javascript is an easy(ish) answer

would really appreciate suggestions on this, thanks