Ray,
Some of the X10 stuff is sold through Radio
Shack stores under the private label Plug 'n
Power and have been for at least two decades.
The bigger stores are likely to have a
bigger selection on hand for this slow, but
steady moving product line. I buy
replacement modules one at a time from them
to avoid shipping, handling, and the delays
associated, altho X10-WTI out of Kent,
Washington, is pretty good, except in your
case, it's another big, complex site.
Brian H. may know of other 1800- or walk in
sources, as he obviously knows the breadth of
the product lines and interoperability much
better than I do....
BTW, don't feel bad on dialup, nightly X10
"newsletters" (one slick newsletter, I may
say) seem to take forever getting from my
server into my email box - and I use DSL!
They are just big, fat, fancy html files with
all the bells and whistles in use.