Vintage Simmons Drums (UK) Users Group

Hello all.
I just joined the group.

I've got a SDS9 with a broken knob. The shaft broke off right at the base.
I went to a surplus electronics place and bought a few different pots hoping to swap parts, but to no avail.
They didn't have any 100k pots near the size needed.
I bought some that had different values, the parts didn't interchange with the factory pots.

Does anyone know of a supplier and part number where I can order a pot that will fit the space?

I ordered one from Digikey that I'm hoping will work, but if someone can offer a known good fit pot I can get in the US, I may order one of them. 

Thanks,
Rich