Audible Illusions modulus 3A, what would be the next level of up grade?

I know this thread is a bit old, but I wanted to let you know how things are going for me and my Modulus 3B.  First, it is an amazing preamp.  With that said, AI is really dropping the ball now on things.  When I ordered my preamp I was told it would take 3 weeks.  It took 5 months.  Worth the wait, based on the quality of the sound.  Back in June of this year I decided to order a set of replacement tubes to have on hand.  It is now 9/10.  Still no tubes.  I was told when I place my order all they had to do was match them up and I would have them in a week or so.  I have called at least 20 times and get a different excuse each time.  The tubes were sent.  We are waiting on a batch of tubes.  They are matching the tubes now.  The tech that does the matching is on vacation.  The secretary is out to lunch and she will have to see if the tubes were sent.  etc, etc, etc.  AI make amazing stuff, but they are now at a point of not being able to even send out a set up tubes.  So sad, since the product is so good.  Personally I am of the opinion that the people that are in charge there have reached an age where they are just letting things slide, and since they make enough money to get by, the rest doesn't matter.  IMHO!