S14 SR PVC grommet

I lost my rubber grommet for my S14 SR valve cover. Where can I find a new one or can I make a silicone mold and it’ll hold up and not leak?

Any ideas on what I should do? I don’t want to make a silicone mold of it cause it wont look pretty with my new powdercoated valvecover.

canadian tire
like $4

Ya? CT carries them? I’m guessing its just going to be a universal size.