I know this is a long shot, but....
I have an FD mount Tokina RMC 17mm F3.5 in very good condition that I like quite a bit, but its the only reason I take out my FD gear. I will sell it off if I can make a swap or sell this for enough to buy a Nikon Mount. I just prefer Aperture Priority.
I like the lens but do not have anything close that fits my preferred Nikon bodies.
I am not concerned about cosmetic perfection but the glass must be in good shape.
Spiratone's, and Sigma's have some Ok models that I would trade for but not all, it just depends on the series.
I would prefer 67mm filter or less, but that isnt crucial.
Thanks for looking, especially if you are that Canon FD guy looking at that Nikon lens you found, wishing you had some way to get the same in FD mount!
I have an FL 55 f1.2 and an FL 58 1.2 that may eventually go up for sale if I can make this deal work out.