You can order this part directly from Feinwerkbau and probably receive it inside a week as their customer service is really good.
I have used them several times recently for spare parts for my Model 80, various CO2 pistols, seals and a broken loading lever on my P44.
When I ordered my P44 loading lever it failed to make the "minimum order" value, so I ordered two - one as a spare, and some screws etc to total 17 euros after speaking with the very helpful English speaking spares lady.
Brilliant service at a low cost.
Rossendale Target Shooting Club. Every Tuesday and Thursday evening 7 - 10pm.