Another thing you could try is go flip around your blevins buckles. (like is done in this picture: full2011 - Servimg.com - Free image hosting service
My used barrel saddle came that way, except without the leather wrapping, and as soon as I'd ridden in it, I went and did the same thing to all my other saddles. Haha
Basically, you know that blevins buckle on your stirrup leathers? The big buckle that you use to adjust your stirrup length. Pull the two pieces apart, and take off that sliding piece that locks it in place, then turn it around and buckle it like that -- the same as usual, just on the opposite side of the stirrup leather. Do the same on the other side.
Just keep in mind: You want to turn your stirrups so that the part that was facing the horse should now be facing forward.