i'm a relative dwarf at 6'2", 34" inseam, 185-195 pounds. i picked up a
great hybrid/commuter in germany, made by VSF Fahrradmanufaktur in
Bremen. Largest frame they had in the shop was 63cm, and had all the
braze-ons needed for touring & came with rear rack, fenders, lights,
700x38 tires, and custom lowrider eyelets on the fork.
i've done some centuries on this one, on the third wheelset with about
50k miles on it. i once moved across berlin on this bike, everything but
furniture, in panniers and dufflebag. this bike should fit you, and can
easily handle your weight. you might check their website, or look on
www.ebay.de shipping from germany to alaska can't be much more than
from lower 48. fedex ground, usually cheapest for frames/bikes will
be about $100 to anchorage.