I think you'll be struggling with off road hacking/year round turn out/not on or near a farm in this area.
You could try Swallows on Norden Road in Bamford but I think they have cows. There are also a couple of other livery yards along Jowkin Lane in the same area.
Hi, we took our 16" down to the local tack shop to sell for us. I can see if they've still got it if you like? It is complete with all three gullets, black and is 16"