Audio Equipment and Home Theater Audio : ELECTROMAGENTS IN THE UK

ELECTROMAGENTS IN THE UK

I want to buy an electromagnet like this one

http://shop.ebay.co.uk/i.html?_nkw=electromagnet&_sacat=0&_trksid=p3286.m270.l1313&_dmpt=UK_CarsParts_Vehicles_CarParts_SM&_odkw=electromagnetic+parking+sensor&_osacat=0

at eBay but the problem is the only people selling them are Americans (on EBay that is) and the cost of shipping one from the US to the UK would cost way to much because of how much it would weigh, so I was wondering if any British people in here know what shops might sell these types of magnets at home i.e. UK that is.
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