Bellows for Graflex RB

I picked up a "project" RB Series B 3x4-- Everything's there, mostly in good condition, but it's suffering from a few decades of neglect. The bellows in particular, have deteriorated to the point where replacement is a better option than refurbishing.

Anyone know of a good source?

I found someone on ebay who sell bellows for my AGFA folder. They seem to suggest they can make bellow specifically as well.