well if you are paying a premium for any american amp.... then look at european amps.... and add an EQ pedal, it wont be exactly like a Mesa, but it will probably still sound great..
Try some out and see which give a thick warm tone... you have Hughes & Kettner, Ashdown, Koch, etc at your disposal. I am sure one of their models can get you in the tonal ball park. You may even try a Mesa V-twin in that amps loop, those are pretty cheap on the used market....