Just get a spacer bushing in steel or aluminum (goes in between pa1 bushing and crank)
Pa2 crank has a 10mm end, pa1 has a 12mm end.
So, get a 12mm od x 10mm id x whatever length you can find.
Cut it slightly smaller than the pa1 bushing and assemble and you're set.
Has this been done before? Cuz it's so damn easy.