I tried the “tuck it in your belt” approach but it bothered me.
My stock fender was made by Mark Howes at Double H Ranch Saddle Shop. It is heavenly.
With respect to non-custom off-the-shelf Aussie saddle brands, the best are made in Australia. Unfortunately, if you have a wide horse, it’s tough to find an off-the-shelf saddle made in Australia that comes wide enough for your horse. I think that is beginning to change, as QHs get more popular over there, but still not as easy to find wider saddles. If you’re looking for used expensive, look for Syd Hill, Toowoomba, maybe some of the James Saddlery saddles.
I have had 2 saddles from Down Under Saddlery in Denver, one cheap synthetic, one more expensive from their mid-priced “Down Under” line. I was very happy with both of them.
If you look for “Australian saddle” on ebay, you get a huge number of hits. But, if you check the box for “Used,” it really narrows down the list and you will find a number of your “used expensive brands” there.
However, lots of Aussie saddles will put you in that chair position, too, so it’s not a sure cure.