barnsby egerton saddle owners- what numnah do you use?

[Blythwind]

As title really. What numnah/saddlecloth do you use under your Barnaby Egerton saddle?

It's a working hunter saddle with longer flaps than my Barnsby gp saddle. I therefore can't use any of my current numnahs as the girth straps are too high (under the saddle) and so the nunnah ends up slipping back.

I already have a Barnaby grip pad,which is fine, but does anyone have any recommendations?

Thanks x