Diagrams/Contact Information for ASI "Class Act" Spa Pack?

I'm planning to repair a friend's spa but because it has been tinkered with already I'm going to need to check out the internal wiring in the control pack to assure myself that I'm leaving it in safe condition. The pack is an ASI "Class Act" manufactured in 1999 and I cannot find diagrams or even the address and contact information for the manufacturer. Anybody have an idea how I might contact them? They seem to hide themselves VERY well and even though I'm usually pretty good at researching such things I've come up with nothing so far. TIA
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John McGaw
[Knoxville, TN, USA]
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