email these guys abbor. I took my Earth Sound Research Super Bass 1000 to them and the guy knew exactly what i was talking about, so you may have some luck with them. They are located in Bellevue, WA, but it's worth a chance. It may also help if you supply a picture of your amp.
ampdog(at)eskimo.com Just replace the (at) with @
The shop is called Erickson Audio.