I second the JAN-Phillips 6922 for a moderately priced option.
I also caution you with ebay. You'll find all sorts of unbelievable bargains like Bugle Boys for $30/pair, but you won't get any guarantee they're usable. If it sounds too good to be true, it usually is. I had to learn the hard way. Now I only buy tubes from vendors with a good reputation. I've had good experiences with Doug's Tubes, Brent Jesse, the Tube Store and folks on Audiogon and Audio Asylum. I've heard good things about Andy at Vintage Tube Services.
Good luck.
I also caution you with ebay. You'll find all sorts of unbelievable bargains like Bugle Boys for $30/pair, but you won't get any guarantee they're usable. If it sounds too good to be true, it usually is. I had to learn the hard way. Now I only buy tubes from vendors with a good reputation. I've had good experiences with Doug's Tubes, Brent Jesse, the Tube Store and folks on Audiogon and Audio Asylum. I've heard good things about Andy at Vintage Tube Services.
Good luck.