I was able to find a coin tray and cmopartment box out of an Stype in a junk yard but the bottom of the coin tray was cracking and there were coins stuck to the bottom. I dont know if it was from extreme heat or that is normal but I was wondering if it is gonna keep happening or if there was some type of sealant or something I could put on it.

 

Clean the bottom surface with something like westleys bleach white. Rinse and let it completely dry. Then cut a piece of thin plastic, gorilla glue it on, and place a heavy weight in the bottom of the well so as to make a clamping force between the two. 12+ hrs later clean up the excess glue and your good to go!

I do all interior cracked panels / repairs like that and it works excellent and is cheap. Just takes a day or so but it'll hold and be stronger than original.