I love these old SWR amps, it's such a shame that Fender are so slow when it comes to spares nd advice. I've just finished refurbing an early Jackson Dinky with a Floyd Rose licensed trem system, and needed to check the specs of the particular unit; all my emails were met with polite but vague responses, despite providing the serial number of the instrument. Not that great in the customer services department.
Hope you get sorted soon mate, the old SWR kit is too good!