Recommendations for where to get a 4L80E?

[Weldon0405]

I'm planning the initial parts of my build and I'm seriously considering the 4L80E with the Shrifter kit. Any recommendations are welcome on where to obtain the tranny. I also welcome any recommendations on a different tranny if you are opposed to the 4L80E. I have read through the recommendations a few times on the T56/4L80E Poll; I just want emphasis on the fact that my car will be a daily driver to include a cross country trip when I move to my next duty station upon returning the the States. Any and all advice is welcomed.