Not aware of one myself, but from memory it isn't too hard to figure out the workings. The thing i disliked with this lens is that the little shifting control is flexible. I found that uncomfortable compared to PC lenses from Nikon, Contax and Canon.
Your best bets might be oldtimer in the UK, or KEH in the US. Hope this helps.
-------------------- Tim BSRIPN
You see something happening and you bang away at it. Either you get what you saw or you get something else--and whichever is better you print. - Garry Winogrand
CANON POWERSHOT G10
If you're looking for a compact camera to complement your DSLR, then Canon's latest model could be just the thing. Richard Sibley finds out whether it makes the grade