C&C advice...questions... what have you? :)

[RoscoTheRat]

I have a small ferret cage that has a side door, I was thinking of a way to have an add on. I came up with a C&C add on, since one bunny refuses to use the litter pan and so I could close them in the ferret part if need-be... ANYWAYS, so I talked to my parents about building the add on, and they are okay with it but since it's going to be coming from their wallets (I'm unemployed right now) they wanted me to find prices. Does anyone know where I can find them cheap or find prices?

Btw, can't get it offline. My mom refuses to buy stuff offline.

Thanks guys.