Torres Engineering: http://www.torresengineering.com/index.html
And has a nice Fende TelerClone kit for cheap $:
http://www.torresengineering.com/teleguitarkits1.html
and other guitar and amps related goodies.
and that links over to this site for some really "interesting" guitar knobs which may look kool on a DIY amp:
http://www.qparts.com/product/knob.html
like this one:
/ed B in NH[/img]