John Hill,
I agree... but determining the ratings of the components, and then finding those components, is not obvious for the cases I'm talking about.
NutLoose,
Thanks!
Since my "clients" (friends) are well aware of eBay, I didn't look yet.
I'm sure they've already explored it, but maybe not necessarily in the right spots...
I'll look at your links, and also set up a wider and longer-term search.
CJ