Available - AN Dac 4.1 Ltd Ed Kit thing. This came to me a number of years ago and to be honest I just don’t use it. There are plenty of nice parts used and it is tested & working. I don’t have all the specifics but C-Cores & black gates etc are involved. Still has the protective plastic on the back. No box but will pack very well. Prices of the latest model in kit form are $2600-$3100. Whoever put this together did a nice tidy job by the looks of things - Please excuse the dust. All images of the actual DAC available.
Tricky one to value really £1100 firm inc shipping.