Tube Amp Kits does anyone still offer.

I was wondering if anyone has had any experience putting together a Tube Amp Kit. I have built my own regulated variable power supply with a schematic that I downloaded off the internet, I bought all of the parts at a local Radio Shack.The Store manager said that he had never seen anyone build something with parts from his store,asked me to bring it in when I was done. I did about 2 weeks later, he was amazed, and another customer there at that time offered to buy it. I have never had any schooling,all self taught, the project was a blast,How much more difficult could it be to assemble a complete kit that I don't even have to figure up the math on to decide what size caps & resistors to buy.If anyone out there knows if there are any companys still offering good hi quality kits I might consider that route.Thanks, Curt.