Wow, kind of late to the party, but what is so special about those Soundcraftmen amps people are going through a lot of trouble to obtain. When the retailer Fedco was in business you can buy them by the trainload fulls. I have one of the older Soundcraftmen PE2217 pre-amps. It's about 20 years old at least, and I still use it to this day, and it has never failed me. Wouldn't a current production Crown D- series amp fill the bill? Those Crowns are bullet proof, I am using a set of D75s