I ride in an 18" western saddle, a 19" english saddle, and a 21" australian saddle...
The problem is unless you custom order a brand spanking new one, or find an old peice of crap that someone has had for 500 years, Where the HECK do you find an XXL seat saddle on a budget?!
I found my second hand 19" Stubben Sigfried CS jumping saddle online by pure LUCK after searching for 16 months...and I found my 17" (yeah it's a little tight) synthetic western saddle at a tack swap at a great price.
What size/type of saddle works best for you? Where did you get it?