A long shot, but I'll be traveling from the Tri-Cities (Pasco, Kennewick, Richland) in eastern WA to teach a Red Cross First Aid/CPR/AED/Bloodborne Pathothens class for Darigold in Bosie on Monday June 24. My route of travel involves attending a Washington State University (Pullman, WA where I lived until 2 years ago) Safety Fair this Saturday June 22 (Red Cross connection with that), driving down to Boise Sunday on U.S. Route 95, driving back Tuesday June 25 on Interstate 84 which takes me through Ontario, Baker City, La Grande, and Pendelton Oregon.
An interweb search didn't yield anything. Yes, the "brick-n-mortar's" have largely been supplanted by the on-line market place but occasionally a few survive, even "off radar" and sometimes in small towns. I lived in Twin Falls, ID in 1990 and there was a great shop in Boise at the time but I can't find their biz card nor remember the name.
So, I just thought I'd ask as it never hurts to ask :-)
I'm from Pendleton, so I'd like to know, too. I can tell you there are no dealers here. As it happens, I'm going to a Red Cross training this weekend in La Grande! I did find this this: http://idahostamphouse.com/