Jakobud:
Yeah but it's not clear where to buy them. All the ebay results are "Electro-craft" permanent magnet motors.... which are not the same thing as an Electro Permanent Magnet.
Try: electromagnet for sale | eBay
I see many such magnets listed. One thing on considering/choosing such a magnet is the 'holding strength' of such a magnet and that is how good a metal to metal matching surface the magnet makes with whatever you are trying to attach to. Such strength ratings assume a perfect 100% surface contact