We were in Windsor and were friendly with Barry. I designed a small mixer specifically for them to market as a ‘badged’ product.
I’m ashamed to say that I don’t really remember much about the details of the mixer except that it was a variation on the Alice AD62 (which pre-dated the 828).
I don’t have any circuit details, but as I recall it was a very simple ‘class A’ design and so probably still sounds good.
Do email or post here a picture of the Itam mixer.