[sdiy] knob problems

[dan snazelle]

hey guys

I am having some problems with my knob manufacturer in Taiwan. I was wondering if anyone here could recommend a good place for having knobs
made. 
specifically Davies 1900h and 1510 clones.


the problem is related to my knob people (with a bad language barrier) suddenly telling me in the 11th hour that they either need to make the knobs T18 or with a copper insert, neither
of which is what I asked for. (and I already ordered thousands of smooth shaft pots)


any advice or links?


thanks so much