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. My favorite material is the new Vella. It is synthetic but seems to be doing well for many endurance riders. It's a short fiber, medicinal quality materia which is easy to clean and doesn't clump like most wools which helps to avoid heat retention.
I recommend 1cm inserts unless rider is over 185.
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.

Replacement base - includes girth rigging, but not panels

Panels for Ghost saddles - and can work for other saddles with loop-side velcro underneath. Price is for a pair of panels or the complete western skirt with integrated panels.
New option - XL velcro opening panels, great for those really wide horses, but may also provide more stability for slab sided horses. (NOT available - or needed - with Thick insert option) Panels for 16" seat run just over 20", for 17" seat is about 21", for 18" is a bit over 22". Important - the XL panels are 7" wide so you need to make sure your pad structure supports that! See more details below.

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.
Here's a great video on using the western cinch rigging - https://www.youtube.com/watch?v=RzkIWioQAXo