You probably both are looking for used deal, but I offer both the all black version for the Hy6 Mo2 and the dark grey version for Mod1 in my on-line shop as well as extra film inserts for these if you want to preload film.
price?
In all black with silver tabs to match Hy6 Mod2: http://rolleiflex.us/products/rollei-6x6-6060-film-back-for-hy6-hy6-mod2-blackIn dark grey with red tabs to match Hy6/AFi:http://rolleiflex.us/products/rollei-6x6-6060-film-back-for-hy6-grey