Good mechanic in Alaska?

I am still wrestling with an large oil leak, and I cant figure out where it is coming from. I am going to break down and take it in to someone who knows where to go from here, but I dont know of any good diesel mechanics in AK near Anchorage. I saw an ad for "Powerstroke Alaska" Any one dealt with them? I am tempted to take it to them rather than Advanced Diesel or even Cummins NW (will they even work on an International PSD?) because Powerstroke Alaska appearently only works on PSDs. Thanks for any advice.