True about Wyeast 2106-PC. It hasn’t been released in at least 3 (maybe 5) years. I was a real fan of that yeast, and still have a couple of frozen samples. The yeast is a strain of pure Andechs, which is also what WLP-835x is.
But 835x is a White Labs ‘Vault’ strain rather than a year-round core release. They had it last year so I ordered four Pure Pitches, along with four WLP-920 “Old Bavarian” pitches, which technically is not a Vault strain but is rarely seen ‘out in the wild’, so to speak. The last time I was on the Yeastman site, I seem to recall that 835x may be on this year’s scheduled Vault releases, so it might be becoming a Seasonal release.
Another Andechs strain is Imperial L26 “Pilgrimage”, though I haven’t seen it in a few years either. When it debuted, I contacted the lab directly and was told it was a “straight up Andechs strain”. I used it in both Coor’s Banquet and Coor’s Lite clones and it performed very well.
One last purported Andechs strain is from Propagation Labs outside of Golden, CO, called MIP-620 “Monk Lager”, but the last time I checked it was only available in brewery sized pitches. Hhmm. Colorado Rockies, Coors, Andechs propagation… Coincidence?
Anyway, Andechs is a great yeast, even if it is difficult to source for homebrewers. Maybe it’s gaining enough popularity to become more widely available. Until then I’ll just keep hoarding what I have and buying when I can.