Vintage Simmons Drums (UK) Users Group

Hello All,
Newbie member here.  I have an 8.5 (out of 10) SDS-9 that needs a few
knobs.  I need 1 grey button and 1 blue button (actually, I need the
entire plastic half-crescent shaft that attaches the blue button to
the pot, but I will be grateful for just the knob).

If anyone has spares (someone mentioned previously that they had the
guts from an SDS-7)...I would be happy to take a few knobs off their
hands!

In case my knob quest comes up empty...does anyone know if Newark
Electronics carries generic identical knobs (or any other supplier)?  

Also...what is the best way to replace the memory battery in my SDS-9
brain?

Thanks for indulging me.

Kind Regards,
HC
= )