Have you tried looking on tacktrader.com sometimes you find really nice ones that arent that expensive. If you already know what you want or have one in mind that is one way to go without breaking the bank. Also , I am pretty sure Fisher's carries collegiates....sometimes they have used consignment saddles and will allow you to try them on for if they don't fit you get your money back (have to pay for it first) also saddles etc..but I do not know about how flex they are about trying it on first. Those are just suggestion....also try to look the saddle up on tack review Horse Tack Review.com - Reviews of horse tack and rider supplies!
I have looked up different tack items just to see what kind of reviews it has gotten as I don't want to shell out the money to be disappointed later. Hope this helps some...good luck with your mare and pony club : )