HP-67/41 Series repair venues

[Matt Agajanian]

Hi there. I'm in the process of having some mathematical brainstorming sessions with my 67 and 41. I will probably need my 67's card reader system refurbished. Card reader mechanics are probably gummy wheel infected and corroded. The 41 may have its own frights.

So, I would appreciate some recommendations for pros & aficionados who would be able to repair my 67 and 41.

Thanks