In reply to Alan M:
Keela is a good call, contact then direct. High quality kit, built to last, by decent people.
Craghoppers have D of E type jackets that might fit the bill too, again get in touch direct.
Any of the big chains might be able to help, especially if things like colour don't matter much. They may have bulk stock of poor selling colours to shift. Even more so, the manufacturers, though they may prefer to go through a retailer.