I'm not musoman but I have bought two orders of Nikon chips from jinfinance on ebay:
http://cgi.ebay.com/AF-confirm-chip...46369?pt=Lens_Accessories&hash=item5192dc0f61
Both orders arrived quickly and were perfectly satisfactory. I've used two of the chips, and still have one waiting for my next manual focus lens.
On my dandelion chip one of the brass pins falls off (i couldnt find it), so now is not working :/ I´d contacted jifinance and said that is not possible to repair and offer a disscount on a new one (no warranty and it have less than 2 months)
Any suggestions??
Regards!