They say one cannot please everybody, but there is no harm in trying. With regards to the PP AMX amp project model 15k, I guess i can be flexible. I can come up with two colors silver or black chassis, brushed aluminum panel, silver or black that would be no problem. As for the power tubes it can be either El34 or KT88 with some minor changes under chassis, ie change of cathode bias resistor. Price target will change a bit with the KT88 driving it higher. But if you are buying it without tubes, price will be the same.
I am hurrying up my accountant so I can declare to you the price. But mind you it will look good but this is a strip model, less the bells and whistles. I am building the prototype after completing my design this week. I hope I can meet the price target you have set, for a minimum run of 10 units. Wish me luck