That blows, sorry to hear that. Hopefully one of those friendly folks from Idaho will step up! If not, there are a few companies I've heard of that do overnight shipping, maybe that's an option if you don't find anyone in Boise to help you.
Here's an idea for an expensive, awful, last-ditch effort:
Call these truck stops and ask if they carry electronic cigarette supplies. (if they do, it will be pre-filled carts).
Flying J
3353 South Federal Way, Boise - (208) 385-9745
T/A
TravelCenters of America | The one stop for all your travel needs | Welcome
4115 Broadway Avenue, Boise - (208) 344-1091
Boise Stage Stop
23801 South Orchard Access Road, Boise - (208) 343-1367
The Flying J carries NJoy products and pre-filled cartridges. They make 2 types, the NPro and the NCig. The NPro has tiny little reservoirs, so make sure you get the pre-filled carts from the NCig (they're the size of an 801). Pull the filler out and put it in your carts. Of course you may need to cut the filler down to fit, depending on your model. I did this with a box of cartomizers once, and it got me through.
EDIT: Hey! I just found this with Google...
Hannifans Cigar
1024 W Main St, Boise, ID 83702-5705
(208) 342-7473
"Check out a free product demonstration from 5-8 p.m. and feast your eyes on a
sample of the most innovative electronic cigarettes on the market."
That looks like it's at least worth a phone call to me!!