For under 5K it's going to be tough. There are power amps with dual mono geometry, which is the same as a pair of blocks (not as sexy though). I just purchased PrimaLuna, did a bunch of searching and found a Dialogue HP with < 100hrs for $2400 and at UpScale they have some new old stock that still sell for their org retail. I got a PL Prologue Premier Pre-amp with full warranty for $2200. They are both dual mono build. So it can be done.
By the way the amps sound great about a 30% SQ improvement with my old Revel's over the old Rotel amps.