I believe I read on here, where a gentleman got a hold of an extra access door ( the ones behind the front seats ) and made it work for access to his fuel pump. That would probably work for you as well.
I posted that as a price reference for the OP. If you're interested reach out to the ad. And if they aren't willing to ship let me know and maybe I can help.
As far as snapping a bunch of bolts, there are a couple of places that sell stainless bolt kits for the Z, unfortunately my old age is preventing me from remembering their names. But I'm sure someone else will chime in.