Tube amp kit. Where can I find it?

Check the following sites. I have built the Consonance Billie and Basie kit, both are excellent. I have also listened to the Bottlehead Paramour and Foreplay, which are also great for their price.

www.diyhifisupply.com
www.diycable.com
www.bottlehead.com

The above by Mindgap are very good.
I have experience with the Opera kits from www.diyhifisupply.com and www.diycable.com and can recommend them.

Both are very good for the money with lots of support online. There are a lot of modifications that can be done. Each has an online forum so you get a lot of help. A key question is how much power do you need, that is, what speakers are you using. The Bottlehead power stops at a 300b.

The Audio Asylum diy tube section is very helpful too if you have questions.

If you are just starting out I have a long list of online tube info you might find helpful. Drop me an e-mail I'll send it to you.

Good Luck
I remain,

...Don't forget to check Welborne Labs at:

http://www.welbornelabs.com/

Ron Welborne makes excellent sounding and well engineered kits that offer excellent value for the money.