Been shipping spare parts from Europe to Iceland with DHL.
Was okay, but the mail is just a tad slower.
Now there is another one called TNT, and that one works together with the mail. They were allright as well.
Oddly enough, in the need of a winter job, I've considered to try offering a service like that, i.e. going and getting things from abroad that need to get here FAST. The idea comes from a grudgy experience when I needed spares from Denmark, found them, payd them and waited 10 days only to get the wrong ones. With 2-3 flights a day

. I lost some 2000$ because of it, the return flight is some$500.
The thumb rule with imports is that if you want to expect anything within 5 days, you must finish your deal on monday/tuesday.
DHL, TNT and the mail are closed over the week-ends.....