MWFI sells glow plugs...the website says that they're Berus, but when I got them, they turned out to be Wellmans. I asked about this at the time, and was told that a few other people had the same thing happen, and that they were happy with the Wellmans.
I haven't had the chance to install mine yet (still need to make a wiring harness, hook up the controller, etc), so I can't comment on firsthand experience...but, based on what the others said, I think you'll be okay...