Vacuumtubes.net looks like they have some available: http://vacuumtubes.net/RES Audio pages/2c51.html Dale is a good guy and stands behind his tubes. He also has some NOS Northern Electric, which was WE's Canadian branch. I actually have a few bought from Dale but I don't think I have the means to match them - they were intended for MHDT DACs. If you're looking at 396A/2C51/5670 tubes, I've also liked Raytheon, and if you search "396" on Brent Jessee ( http://www.audiotubes.com/audtube.htm ), he gives good descriptions of other brands. WE is getting scarce, and scarce means that prices are usually much more than performance is worth.