Spare MPC parts in uk

Hey guys, I'm new on here so apologies if I haven't followed the guidelines of the forum but I need help in sourcing a power button cap for my MPC X. I've recently sourced an ex demo model for really good price, its in perfect condition with the exception of the missing power button cap.

Other than MPC stuff does anyone have any cost effective ideas where I can get a replacement part in the uk?

Thanks in advance

If you don't care if it is original or not you might be able to form some Seguru or whatever that plastic molding is. Super Glue a lego onto it?