PLAN B analog blog

I need to replace two B10K pots on my Model 15.

As far as I can find (Mouser, Jameco) they are 
Alpha 16mm B10K PC mount knurled 

But I can only find audio taper in that format (which I guess I'll use unless I can find an exact 
match).

So I'm just wondering if anyone knows a source?

thanks!