It seems like Belmont Station sometimes gets bottles when they hit limited distribution, so it may also help to keep an eye on their bottle list around the time of releases -
http://www.belmont-station.com/index.php?id=bottles. If you can’t find someone going down to Corvalis, maybe a Portland person can get you a bottle there if it leaves the brewery. I found La Ferme’ de Demons there late last year and I think I’ve seen some other Block 15 items on their list at other times. I forget the exact price, but I think it was around $15-16 cash and $17-18 credit?
I’m from up in Seattle and just moved here last summer, so other folks probably have some other/better ideas since I’m still fairly new to the area.