Where to buy fragrance oils for bath salts?

For those of you who make your own bath salts, where do you buy your fragrance oils? Someone did recommend a good company but it is based in Canada so shipping is a little high to me since I am in the US.

Thanks!
Jill

p.s. sorry if this is not the right place to post this.

http://www.splitcoaststampers.com/forums/techniques-f11/where-buy-fragrance-oils-bath-salts-t511097.html