Thank you, guys, for the excellent suggestions. I was intrigued by the last one - simple and small - but upon rereading the copy on it this AM, see that it is a preset variable boost. I want a hands-on variable boost.
BTW, this is the guitar I have in mind for the preamp: my '98 USA Reverend Avenger (3 single coil model on the left):
"For me, I think the only danger is being too much in love with guitar playing. The music is the most important thing, and the guitar is only the instrument." Jerry Garcia