Full seat saver (Zalea)

Ghost makes an extremely nice pad, especially for the very reasonable price. Many people buy these for other saddles including BMSS, Freeform, and even treed saddles. Bottom material options include sympanova (a soft rubber, easy to clean, breathable), black, brown or white wool blend, and an amazing medicinal sheepskin. I recommend 1cm inserts with sheepskin unless rider is over 185, and for other bottom materials unless over 165 or horse's spine is well protected.
Add embroidery with your horse or barn name for extra fun!
I keep mostly black with various bottom materials in stock. Others will have to be ordered from Italy.

Ghost now has several options for girth/cinch rigging. The original sliding V is great as it allows the rider to independently position the girth and saddle and the sliding V will move with the horse through all gaits. Any saddle may be ordered with cinch rigging, either nylon or leather covered nylon (some have commented the leather covered doesn't slide as well as the nylon). And now we've added the option for the Cavallin/Puro rigging for all saddles as well. This rigging is simple and in some cases more stable since it can't move as easily with the horse, but the rider can adjust the girth position by tightening one billet more than the other to create the desired angle.

If panel shims aren't enough or you have closed panels, it's also possible to shim in the pads (although the pocket shims for close panels may be a better option for both cases). You want to make sure you are still using the foam pad inserts so you don't put a transition next to the horse, plus they'll stay in place better.
One advantage of the pad shims is that they are easy to put in place while the saddle is on the horse (not girthed) and can easily be removed if one horse needs shims and another does not.