http://www.farthingalesla.com/
This is the US version of the site I bought my bones and eyelets from. There are also some very helpful instructions and tutorials on the Canadian site, I have no idea if they're on the US one too. Oh, also, I strongly recommend buying spiral steels as opposed to straight steels for your first corset, they're much easier to wear for beginners. Obviously steel boning is supposed to be quite stiff, but the straight steels are probably much moreso than you'd think, so when you go to wear them, it can be VERY difficult to achieve the shape you're looking for. Spiral steels offer the same support but with greater flexibility, which translates into easier lacing (especially if you don't have help to tighten the laces for you) but the same level of waist reduction once secured. You'll still want to buy straight steels for the back (they'll lay parallel to the eyelets) though, because there is tremendous pressure on the eyelets from lacing and you'll want as much reinforcement as possible. If you have any questions, feel free to PM me! Good luck with your corseting, it's a TON of work but the payoff is amazing <3