Since your quest is so noble, here are some more thoughts...http://www.highpeakscyclery.com/index.html
Lake Placid, does some backcountry I think.http://www.catskill-bcski.com/index2.html
The just use regular alpine boots, but they might know of rando shops.http://www.garmontusa.com/index.html
The U.S. Garmont distributor is in VT, so maybe they'd let you come by if you beg. (Supposedly the only shell sizes are 26.5, 28.5, 30.5, and everything else is just liner mods.)http://www.bdel.com/
They distribute the Laser, which quite a few random shops might have. You could also order a bunch of different sizes from their web site, and return the ones that don't fit you? Just remember that they use U.K. sizes, and a size 8.5 & 9.0 (etc.) are really the same shell.http://www.lowaboots.com/
The Struktura is almost impossible to find, so this might be a hopeless quest.http://www.life-link.com/
They distribute Dynafit, and maybe you could order a bunch of sizes, etc. Since these come with the Thermofit liner, which will adjust somewhat to your foot, this might be the best bet.
In case you're wondering what I did:
- Originally bought an old Euro-only boot (don't know how it ended up in U.S.) for only $50 from some guy on the internet (who insisted they were regular downhill boots, despite the picture of a rubber sole), which worked decent. Then in Tahoe (great selection of shops w/ AT boots) in May tried on a bunch of the latest boots (Laser, Stuktura, All-Terrain) and was very impressed, but they didn't have my size. Upon my return planetoutdoors.com (now defunct) had a great sale on the GSM, so I took and risk, and it worked out fine.
- For my wife, originally got a pair of Dynafit former rental stock boots from IME in Conway, which were decent, but still wanted something better for our upcoming trip to France. Bob Smith's in Boston had the Laser, but not in her size, and wouldn't special order multiple sizes, and the women's version was not yet available in North America, so took a risk (especially since the price is about half U.S.) and ordered from: http://www.telemark-pyrenees.com/
...and with their help figured out which size was best, and it worked out fine. (TP also has Thermofit liners really cheap.)