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hmmm not sure iof you can buy them anywhere..... FOOKz will probilly know...but if you had another busted matrix pad you could strip component off of there....
It looks like a smd power inductor, but i may be wrong, wait for someone else
Yes its a power inductor.http://parts.digikey.com/1/parts/641171-power-inductor-22uh-2-2a-smd-cdr125-220mc.html
As long as you can get any 22uH Shielded Power Inductor it'll work. It doesn't have to really be SMD, but if it is make sure it's 'footprint' is the same, or at least close, so it'll fit on the existing pads.It should be replaced, but a jumper wire can be used if you can't get/find a replacement. The controller will 'sputter' on start up with a jumper wire in place, but it will work.