Hi Nick....If you do some searching in the BC part of the forum you will find several posts I have made over the past number of years concerning both sea runs and coho. Here is one I made last year in that part of the forum. There is another called Island Magic dated Oct.21, 2012. There are also posts in the fly tying section (What are you tying 2015 edition, page 4 shows one of my favourite searun flies) showing some of the patterns I have found to be very effective for these fish. Hope you find what you're looking for.
http://flyfishcalgary.com/board/index.php?showtopic=22628