I bought it from LambdaTek, 2x 48GB modules rather than the kit, but they're out of stock now (of both options), and don't have an ETA for new stock.
Which is very frustrating, as they're not able to replace the DOA module for me. I can do a warranty replacement direct from Crucial, but I'll have to pay to post it to them if I do that, bleh.
Including shipping it cost me £317 total, whereas the typical price I see most places right now is £191 a module == £382.
ETA: If I cross my fingers that Royal Mail won't screw up, I can send with just £150 of loss/damage cover for only about £3, so not too bad I guess.