This kit might be useful for a practice amp.
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-214
This one's got a bit more power (I assume it would be easy to convert to run in parallel):
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-212
And finally, a guitar preamp kit. I wish there were more details about this one. I'm curious, but doubt that it would sound that great. Seems a bit pricey, too:
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-134
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-214
This one's got a bit more power (I assume it would be easy to convert to run in parallel):
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-212
And finally, a guitar preamp kit. I wish there were more details about this one. I'm curious, but doubt that it would sound that great. Seems a bit pricey, too:
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=320-134