I know what it's like living in english land with no western tack around. I've been searching for a used saddle for a long time, and some places I have looked are tacktrader.com, kijiji or craigslist (just type in Dale Chavez kijiji or craigslist on google, it will pull up any of these saddles posted on those websites) equinenow.com, and horsetopia.com. Sometimes barrelhorseworld.com will have some pleasure stuff, but its mostly barrel saddles and tack.
ps, sorry for the bold. I have no idea why its doing that, and why it won't let me fix it :S