Not seen any in the sales but I would recommend the Harry Hall long riding coat.
Best ones are the older ones - you quite often see the come up on ebay -the cotton waterproof one as opposed to the nylon one. I have both but prefer the cotton one
I had a Shannon that died long ago, but MT don't make them anymore. I love, love, love my old, nearly dead Musto Suffolk (which I actually bought before the Shannon), but they don't make them anymore! Grrrrrr! I can't find a long Harry Hall, so I assume that's discontinued too?
I've been looking at the Target Dry Outback - does anyone have one? Is it any good?