Wanted- Quick Change tripod head adapter

The head (manfrotto 496) on my Manfrotto tripod doesn’t have a quick connector and the K7 has to be screwed on and off each time I use the tripod, so I'd like to get hold of a manfrotto Q.C. adapter 323, or else a complete spare head 496RC2 with the quick change adapter built in.
Warehouse Express has the adapters in stock, but I thought I would check here first in case anyone has one they might want to dispose of.
So if anyone has a manfrotto Q.C. adapter 323 or complete 496RC2 head they’d like to sell, please get in touch.