Wish I could help. I've got a set but it's waiting for me to finish rebuilding a cylinder head. Keep an eye out on the Portland craigslist.org for people yanking the early small engines for bigger sixes or a V8. I'm not sure when exactly they went to hydraulic lifters but at that point the rockers became fixed and non-adjustable.

Have you tried crossing the river to Vancouver? There's a salvage yard called All American Classics http://www.allamericanclassics.com/ that has a few Falcons & Comets.

Also, here's a link to a thread on the Ford Six Forum talking about tips to get oil to the rocker assembly. http://fordsix.com/forum/viewtopic.php?t=29111 Lots of good tips there. If you're not a member of that board, it's a good one to read.

Lastly, there's a club in your area called "Columbia River Falcons and Comets" if you haven't met them yet. Really nice people and I'm sure they could help you out. Let me know if you need contact information.

Hope this helps...