Probably easier to make new ones. You have to remove the body to replace the whole section. Just cut out the bad part and replace with hose rated for fuel.
Just ordered one as well. Thanks, Brad for what you do. I was wondering why I didn't see anything on your site for the 100. I have bought 2 of the cupholders for my 80s, but I like that you don't want to step on someone else's toes for a few extra bucks.