Having studied the schematics a bit more, I'm pretty sure that the following statements are correct.
1. Your pdf above page 1 is the schematic for the Champion 20 only (has no footswitch)
2. Your pdf above page 2 is the PSU+PA schematic for Champion 20 & 40 and shows that the Amp module (for 40 only) is the TDA7294 which looks like it's the correct footprint as per my pictures and is available on Digikey for $9.46 (1,063 in stock).
3. My pdf (attached below) page 1 is the correct schematic for the Champion 40 (includes the footswitch)
4. My pdf pages 2 & 3 are NOT for the PR4222, they are PSU+PA for the PR841/899 models only (whatever they are).
1. Your pdf above page 1 is the schematic for the Champion 20 only (has no footswitch)
2. Your pdf above page 2 is the PSU+PA schematic for Champion 20 & 40 and shows that the Amp module (for 40 only) is the TDA7294 which looks like it's the correct footprint as per my pictures and is available on Digikey for $9.46 (1,063 in stock).
3. My pdf (attached below) page 1 is the correct schematic for the Champion 40 (includes the footswitch)
4. My pdf pages 2 & 3 are NOT for the PR4222, they are PSU+PA for the PR841/899 models only (whatever they are).