This may be too much information, but for the true parts geek:
The PN for the accelerator stop is N 00084 0008220. An N number means that it is a generic part specified in the DIN und Normteile book. This number is in the book as a "cyl[inder] head screw" M8 x 50 mm, exactly as shown in the picture.
Good call, Andy.
Cheers,
CT