Just bought a 3.14 diff at short notice from http://www.kitcardirect.co.uk/ and had excellent customer service from Sean.
He went to the trouble of stripping it to inspect the internals and sent me photos at very short notice as I was heading off on my hols and made sure
it was here waiting for me when I returned. He even dispatched it before my paypal payment had gone through (I thought I'd sent it but it failed
unbeknown to me). Was a good price too.
I wouldn't even have considered an MK under the previous ownership but based on this experience I'd be knocking on there door if I was going
for a new build!!
Well recommended!!