Sorry.....just saw(pun intended) this post.
I started out using Bailey's, but recently have moved away from them. Their website has 'everything listed', but they rarely have 'anything' in stock....expect long waits now that the 'gifted personnel they employed' have started their own company(and have backing from the vendors that Bailey's had used).
That said, I started looking at a LOT of places.
If you are just wanting to purchase a loop or two, your local shop is the best resource. By the time you pay shipping, you will not beat the 'local shop'.
If you are going to be ordering 50+ loops of chain a year, then you should really think about getting the equipment and making your own....it is really easy and not that expensive to get started. Still not wanting to make them? Okay, some folks just don't want too...
Chainsawdirect.com - pretty quick, great people.
Leftcoastsupplies.com - took over where baileys dropped the ball
Baileys.com - still open, just might have to wait
Make your own loops?
>>>link for stuff<<<
Hope this helps?
[edit: by the way, you need to know what type chain you want...it'll be on the side of the bar]
Scott (chainsaws are fun) B