Those trap door stickers are hard to come by. Glad you found one, but yeah, I'd replicate that thing 100x over if I could.
The most durable and best colored stickers I've gotten for any of my games ever came from Ovfdfireman, perhaps he can assist, it's who I would go to again if need be. The stickers I got were for the ramps & etc. on No Good Gofers and it's amazing how well they've held up - virtually no wear, fade or anything detected after over a year.