ugh....you better buy that gun!!! That's the first 7-1/2" 5-shot I've heard of outside the factory!! And as far as I know Ruger shipped less than 30 in the Alaskan! If you don't buy it, please send me a PM to let me know where its at.
Also, if you get the chance, I can sure use the sn off of that one for the reference. The only one I've heard of was 552-05313 that was pictured in Ruger's press release for the model.
Chet15