All,
I have a 4.55 (9/41) a-series diff available for sale. I bought it from ebay thinking I had a 4.22, only to find it's what I already had. I'm only tripping over it at the moment, so might as well replace it with some cash in my pocket.
I'm going to stick it on ebay, but if one of you lot want it, I'll let you have it for a bit less.
Casing is in really good nick, spins freely, does have a bit of backlash though.
I can bring it up to cadwell if that suits.