Wooden ledges

Me and my friends just got a 4 month old chinchilla named stitch (girl). She is still little so we have in a smaller cage. I was wondering where you buy the wooden ledges and shelves because we will be getting her a new cage. Hopefully a Ferret Nation! I can order them online (I have paypal) and would like to get a good deal. I know some people on here have stores and wonder if they sell them. I already ordered some sticks from someone on here and they were very affordable.



And one more question. If we get a FN will a single be big enough?

If you need more info just ask.