A little OT Anyone have a neoprene grommet?

I need one neoprene grommet that fits a 7/16" hole and has a 5/16" opening. It will go into a hole about 1/16" deep. The grommet will come in occasional contact with gasoline, so rubber won't work. The only way that I have been able to find them is in a 50-pack which is 49 more than I need. Any ideas?

 

I have a box of them grommets.

Let me go measure and take pics..

brb...

 

Crap. I thought they were neoprene, but they are rubber.

 

I think Harbor Freight has an assorted set of neoprene grommets for around $10 or so. More than you need but at least you get several different sizes for future needs.

 

Thanks for your replies. I'll try harbor freight first. I can find rubber ones anywhere, but neoprene is like finding gold.