Welcome to the forum. But, what's a "streetrodder"?
You might want to check with some of the vendors you see advertising here on the forum. They might not be local to you but they all have good reputations for customer service and after sale support. That can be a good thing.
It will be up to you to decide, 2 stroke or 4 but take some time, do some searching and reading here and it might help point you in the direction you need to go.
Good luck with whatever you decide to build and I can tell you that these funny little bikes are as much fun, or more, than a streetrod and a whole lot cheaper to build.