Most bearings and seals are available from a local bearing store, but be carefull with the crank bearings, they may try to sell you a bearing the same size but with not as many balls, the original crank bearings are extra heavy duty and they have an extra ball, they are available locally but you will need to show the old ones to the bearing shop and insist on the same bearing, and there is a way to install because the extra ball bearings have a small notch on one side to get the thing assembled with the extra ball, look in the manual available online from lots of sites to be sure, and again follow the manual to get the crank seals in correctly.
The gaskets you can cut yourself with a bit of patience or they are about $50 a set from most of the following:
If you get stuck for Husky parts or advice try Michael Hughes at Bendigo Dirt Bikes
http://www.bendigodirtbikes.websyte.com.au/Or from the US Chuck Cureton at Husky Junk is the best, email him a list and he will email back prices and postage, never had a problem with him.
http://www.huskyjunk.com/Others are:
http://www.vintagehusky.com/parts.htmhttp://www.husqvarna-parts.com/page/page/3737813.htmhttp://www.husqvarnavintage.com/or us ebay seller Tritrophy (has lots of gears NOS) and again if it's not in the online store send him an email and ask
http://stores.ebay.com/TriTrophy?_trksid=p2047675.l2563or from Canada (but the postage is REALLY slow) has a lot of NOS parts
http://www.huskydoggg.com/Home.html