Yes, yes I do. The range of possibilities goes from Sovteks at the lower end to EH (electro harmonix) in the middle range, all the way up to N.O.S. (new old stock) Mullards at the top. But if you spend what Mullards are worth and put them in a Peavey, I'll have to kill you for your own good, no offense to the amp.
The best tube source I know of is
www.thetubestore.com, which is great for both price and service. They also have reviews of tubes (major geek alert) which will help you. A matched pair of EL84's from electro harmonix is $19.95 plus shipping, so figure $50 delivered. The other $75 the guy was gonna charge you was largely profit, because those tubes simply pull out and plug in, observing pin alignment. The only possible other labor involved would be biasing the amp towards those new tubes, but if you email them at thetubestore (or call, much quicker) and ask about it, I'm 95% sure they'll say you don't need to re-bias if you get the right pair (voiced the same as current pair), which they could verify.
Don't spend $125.