I have a spare set of them I purchased from Bill Lavinger (former owner of 898 & two others). They are across town at my shop, so it will take a couple days before I can get over there. Honestly, I have no idea what a fair price would be. I know I over-paid for a box of "old goose bits" he offered, but these were the best items in the box. I will post pics once to get to the shop and locate them. From what I recall they are in fairly good shape. Perhaps we can work something out.
MH