I'm not sure - but I think you'll have only the 3rd or 4th custom LIKE seat in the N. America.
(that's not very many happy rumps - although some fellows claim they're happy with the stock seat - and some even like sitting clear back against the top trunk to avoid the worst of it)
I hope 1.5" of memory foam does it for you. I have a
very manly posterior
- so I needed rather more than that in my many test rides, until I was no longer able to feel
any of that crap in the middle of the seat pan. At that point I quit adding foam.
I have no idea what my seat height is now - but you gotta be a big dude to get flat footed at stop lights now. Feels good to me - but sitting up there took just a bit of time to get used to. Don't notice it any longer. Safer, too - with my knees back from the hand grips.
Looking forward to your report, and pictures - & that gal may be a keeper!
Stig