I have a small, round section A and the only thing I found that fitted her was a Fylde. If you can't get hold of one of those, try a crupper (but make sure you get a good jockey to try it first as some ponies can REALLY object to them!! Cue Handstands!!) Good luck though
I would have a one made for you. Have a very tabletop sect b and only yesterday had numerous saddles on him!! have ended up getting on made for him he is extra wide lovely saddles and only £550 from our local saddler
He is young - only 3 and his may be the issue, but pretty well developed for a 3yo. Don't really want to spend a whole load of money on a saddle that might not fit him in a few months when he grows. Has anyone tried a synthetic with an adjustable gullet?
Personally am not a fan of synthetics as find that they drop considerably when a rider is on them (unless the rider is very light). Can you not get a second hand saddle fitted then part exchange it or reflock it in six months once he has built up some condition?