I'm usually just a lurker, but I've been interested in this as well. I know here in Wa. it used to be "illegal" for a barber to use a straight razor. Because of sanitary reasons, but this is changing and more are going back to using the straight razors. My wife and mother-in-law are both barber instructors and they are still tested using straight razors to get a Wa. barber license.
There are tons of forums just like this one with tons of info. Here are a couple I've found. Just google straightrazor and a ton will pop up.
http://straightrazorplace.com
http://badgerandblade.com/
So far haven't found any kits. One site used to sell the blade blanks. Your options are to make a blade from scratch or buy and antique. The it's a matter of making the scales (handle).