Hi,
Funny, back in the days when I designed modular plug-ins for the system used by east german radio/tv we ended up using exceedingly complex mechanics and electronics to take a ten-turn linear wirewound rotary pot and make into a logarythmic sliding fader.
Of course, we did all that simply because we had no better past time and because actually spending three times on parts in a "fixed price" module (we did get the money back through back door charges nobody had to accept unless they wanted to) amused us.
You know, you should occasinally have an actual talk with your "friend" Tim. It might teach you a thing or two.
Past that, you might just want to try what replacing ANY pot (including the switched resistor ladder type one) with a transformer does....
L8er T