FAST 201 Caps

I modded one of my FAST 201’s and I was thinking of removing the (in my case) blue starburst ring and put a bigger cap that is clear on each side, anyone know of a cap that would fit the FAST 201 without the Starburst rings in?

P.S. The reasoning behind it is I want to paint the interior of each side to make a completely custom look.

No one?