Rel "legacy" subs and fixing the amplifiers.

I have a REL Stadium 3 sub and it hums (60hz) when powered on with NOTHING attached to it.  I took out the amp and could see nothing obviously wrong and went on line for some information.  Called about a local tech who I trust taking a look.  It is a pretty simple amp,  Was told that REL does not provide schematics so he wasn't sure about fixing it.  So I called REL in CA and was told that REL no longer supports "legacy" models.  REL was at one time a high end company that made good/very good stuff and provided excellent service.  WTF?  I have been all over the web and have yet to find a way to get my amp fixed.  I like the Stadium 3 and especially the wood cabinet and want to keep it going.  REL offers sum small $ towards a new REL but why would I want another REL?  The amp is a single board and probably needs the filter capacitors changed out (several sources on the web).  Can anyone help?  Has REL gone the way of Bose which I am told doesn't service earlier models?  Let this also serve as a warning about buying an older REL that no one seems able to fix.  I now look at my REL G-1 and see it as a disaster in the making.