1, I'm sure you could find some on ebay, probably a good attachment that could make a lot of money
2, I think there is only one handler there, they were very efficient though. Arranged transport for the pax and crew into town all on the bill, nice hotel for a couple of days. Get there early on your day of departure for de-icing and warming aircraft etc. It was -20 when I last went there (get the toilet emptied). If your lucky and get in early enough you'll most likely be able to get the aircraft in a hangar.
fairly nice but small town ... lots of night life, which is just aswell as lots of night. good to see the northern lights on a clear night in right conditions.
3, The santa's village is out of town and fairly close to the airport, mainly just lots of shops selling crap but a few good things, not cheap. There are some activities aswell though. If your staying there and weather permits there are many tour guides that arrange sledge rides and snow mobiles etc and some good stuff out of town.
I had quite good fun over the few days. I think the kids liked it to
ps. watch out for santa, think he's got a Mode S exemption.
Pack warm !
EB