Where can I buy a Rec Gain knob for MPC4000?

I need a new or used rec Gain knob as mine has broken. Do you know where I can get one from? I live in the Netherlands. I found one on mpcstuff.com for $4 or $6 but shipping is $20. The knob is in 2 parts, definitely I need the grey/red top part, but also happy to get the lower white collar too.
Can anyone suggest a nearer supplier/website or similar? Many thanks.

Try finding a replacement knob at goodwill toy section or pawn shop most knobs have the half moon looking piece see if you can find one with the same radius {CRAZY GLUE WORKS}or {Liquid nail} happy hunting peace.