Thorowgood synthetic saddles made in England
Also, check out the greenhawk (tack store) website they have them for sale there. Maybe you can find out the price range of your saddle from these two websites.
I've never owned one, but I've seen them in the Greenhawk store. They're synthetic saddles, and don't seem to be that bad. They seemed a little stiff to me, but i'm no saddle expert. They would probably mold to your horse eventually. They're on the lower end of the saddle price spectrum, which means that they probably won't last forever. In the store they often sell them in "Starter Kits" with all the other tack stuff you'd need for a horse. Someone I know bought one for her TB, but it didn't fit her horse, so now she's looking for a new one. The lady who looked at it also remarked that the saddle seems somewhat overflocked, but I have no idea if this is true. I think they have a gullet system, but i'm not 100% sure. That's about all the information I can remember for now, sorry =P
I personally would rather buy a nice leather saddle from a local consignment store, but not everyone has one around the corner. It would probably be a good saddle as long as it fit the horse well. I've sat in one at the store, and they seemed comfortable for the price.
I know how hard it is to find a saddle for wide horses, my mare that sadly passed away was a Fjord cross, and the only saddle that would fit her was some expensive custom english one. She died right in between of fitting and buying the saddle, so I never bought it, and don't remember the brand. It had some gullet system too, so maybe another saddle with the gullet system would fit your horse? If you have any saddle fitters in your area it would probably be worth the money to get him/her out to help you =)
Good luck, and hopefully this helps you =)