Where can I find this replacenent part for my Mackie Trump12 loudspeaker?

Hi guys, I'm asking for any help here. My Mackie Trump12 loudspeaker is damage because of an electrical surge or something like that.

I'm looking to buy this replacenent part:

I haven't find it anywhere. If you can help me find it, I'll be very happy.

This is the: MACKIE 2042206-00 PCB ASSY ASP THUMP-12Av2 INPUT DSP (2042206-00) but also this other can work as well: DX-2048294-00

This is the rear view of the loudspeaker: