Ring up I did, HJM.
Turns out they're plastic with electroplating on (I didnt realise that you couldnt have metal covers on SCs, that it grounds out the pickup).
Tim sent me a set out for nowt! Refused payment infact (I had my credit card in my hand!)
Best. Customer. Service. Ever. 8)
P.S. I hope I'm not setting a precident for free replacement covers or anything by posting that :lol: . I'm just really pleased with the aftersale service and felt the need to tell everyone :D