I think I found a way to allow other, modded bodytypes to be covered by this mod.

You'd need to create a new XML tag (or use an existing one, I'd have to dig deeper) that specifies your desired BodyTypeDef.
Then, instead of hardcoding the BodyTypeDef in C#, you'd read and apply that target-def

I'd love to help you figure this out, but I'm not set up for C# aaaand it's been 20 years since I had a go at C# ;)