saddle pads for shark fin tb's

Right now I use a close-contact numnah pad under my saddle on my tb mare. But I think maybe I need something else, a little extra padding in there, especially above her withers (or shark fins, lol). She hasn't acted funny, like its been uncomfortable for her, but I just wanted to close up the space a little in there. I tried a keyhole but it was too thick and looked dumb. Is there some sort of flatter type of pad that would work? Or is she ok with just the one pad??

Tb owners??

My husband's Anglo Arabian (TBxArab) gelding goes well in a Skito Correction Pad with Shoulder Bridge shims. The shoulder bridge shims are designed to fill in for horses without a lot of muscle on either side of the withers, behind the shoulder blades. If your saddle fits well, then go with the 1/2" foam and 1/2" shim. That shouldn't change your saddle fit (the foam smooshes down some when you're in the saddle), but it will still provide good protection for his back/withers.

Is the saddle fitting well? If so, a saddle pad shouldn't be anything more than keeping the saddle clean.
Having said that, I use a saddle pad and a (thinner) half pad on my gelding. Denny is so darn skinny I want to protect his back a little more than with just a pad. I use a half pad by Cottage Craft; it's a slightly thinner pad than you see with the Mattes or Christ pads, but offers a really good quality sheepskin - at a quarter of the price.