There are some nice non-conventional blue herringbones in the London Lounge Fox Flannel set. For worsteds, you just have to choose a weight and there will be any number of navy and RAF blues. Lesser 13oz has been one of the safer bets there-- assuming they haven't re-spec'ed the new book.
I actually stopped by Clegg's plant in Fall River a few weeks ago. Hard as all hell to find, but they were very nice and had a representative sample on their shelves to look at. What I saw did indeed appear to be very good, and fairly priced. To this non-expert in leather-craft, anyway.