Hainbach test equipment

Hey all,
I don’t know about the rest of you, but Hainbach has been a real saving grace for me over the past year or so. His use of test equipment is such a breath of fresh air, it’s really got me thinking about music differently.
I’m curious if anyone else here feels the same, and further if anyone has tried building some Hainbach-esque patches?
I’m really curious about his word generators and lock-in amplifiers. I’ve managed to patch something similar together using an oscillator, vca and band pass, but definitely would like to find something more true to form. Also, would be curios to know if someone has recreated any Bruel & Kjaer oscillators and band pass filter.