$85k, let my check my wallet....
Sorry, no I cannot help you. I do have an old 1000000 Turkish Lira bill, but I don't think they will accept that (it was worth about $0.50)
Question is: did they also provide some 'assistance' on how to produce it more cheaply?
Just looking at my standard fabricator Eurocircuits --
https://be.eurocircuits.com/shop/ass...b-d815c93952de0.09mm TW/TT, 12 layers, 100x80mm -> €534/pcs for 5 pcs.
Perhaps not your spec, but at least they are willing to give tips on how to do it. However, they do not have microvia support.
we-online.com, 0.085mm inner layer, 0.1mm outer, should be able to do HDI.