Old Habit used to sell these reversible canary/tattersall hunt vests. The store is closed now though Anyone seen them for sale anywhere else-online or in DC metro area?
Try Ebay UK.
My wife uses one we got there.
Label in the pocket says “Crowther Classic,” made in England. May help with your search.
I purchased mine from Old Habit years ago. If anyone finds a retailer please share–I would love to have another one.