Audible illusions Slow customer service

Ric Schultz of EVS (Electronic Visionary Systems) might be willing to work on an AI pre-amp. He worked at the company for a while (in the 80's or 90's, I believe),  and came up with a series of mods for the Modulus 2.

Somehow people keep doing business with AI even though they know that the service from AI is at a snail’s pace. Maybe be because their preamps are so much worth the all delays?
For me, it wasn’t that bad. I always got prompt responses from Art or somebody else at AI.
I ordered a new set of tubes for M3B MM, and it took about a month. I was not mad at the long delay, but somehow I expected that their service would be slow, so I was OK with it.
The bottom line is, as long as it works, it sounds so good.

Still waiting on this guy.

Still waiting on this guy, Opened a BBB complaint

Have you just asked for them to send it back? They aren't that exotic. Any qualified tube tech should be able to repair it.