can anyone tell me were I can purchase a set of pattern timing belts for my wife’s 2002 620 ie we cannot afford genuine Ducati timing belts I can and will fit them myself 
Not sure, I know some a Fiat belts should fit, have you priced them up from dealer or specialist, if there is one thing you don’t want to go wrong it’s a belt.
I would use Ducati belts if I were you. As Martyn says that’s one thing you don’t want to go wrong.
Genuine belts for 2-valvers are not expensive. Bent valves are.
+1