Sinar Part Number Needed

Further to my posting for a WTB on a Sinar extension piece for my
Wolf/Alpina/A1 monorail, do any of you brilliant people have access to
documentation that will give me the actual Part/Catalogue number of
it?

Better still/in addition, does anyone have any literature
(brochures/instructions/etc.) of the above mentioned camera that the
would let me have (or sell me, or copy)?

I'm willing to accept posts off-list too.

Regards,

Kevin
Leighton Buzzard, UK