I have one for you, my search for the lonely mountain of Gnomoria
Center : 500 : 580 (250 : 290 for preview if you want to move it around)
The slider for flat-tall is just before the N of the Narrow below it, in front not on top. (6 steps from the right)
The sliders for wide-narrow are in the same spot as smooth-bumpy just past the s on hills. (2 steps from the left for smooth-bumpy) (7 steps from the left for wide-narrow)
If you need any clarification on that just ask.
I had a bunch of seeds saved somewhere, I cant find them atm, but if you or anyone else have any specific types of seeds you want I might have something close.