I got mine from Gerrick Demyers at http://www.royalconstrictordesigns.com/ very pleasant experience. He is a real stand up guy.
As for a differnce from norm to sd tics. I think they are the same. Mine is a real sweet heart but a bit flighty at first when you reach in for him. He always looks like hes gonna bite but hasn't so far. Well he got me once when I was feeding. Note to all "snake is faster than you are". lol.