I have 1- 90mm and 2- 100mm idlers that need new bearings in them. They are clear. They have some wear on the belt contact surface. I will sell all three for $60 Shipped. I can get pics later tonight if you are interested.
You can see two of the idlers in this pic. I already have them off of my cobra. The wear on all three is about the same. I can still take better pics tonight. I am not selling the aux bracket though.
I know that you can order them, but I can't remember what part number they are. You might be able to contact Billetflow and have them send you replacement bearings. I can't see it being that much, as bearings are not expensive.