I realize that not too many frequent visitors to this forum need it... But just in case: Level9 sports still has in stock the 2015 model (white/flashy yellow) of Head/Tyrolia PRO 11 bindings.
What is special about these bindings, is that the 2015 model year has a confirmed and documented in Tyrolia technical manual delta of 7 mm. I learned from talking to the HSS shop that Head/Tyrolia has the habit of changing delta angle of nominally the same bindings model from year to year. Finding out the model year of the bindings offered in an internet or retail store, and finding what delta these bindings have, is quite challenging.
Level9, at the time of this writing (Sept 21, 2018), sells these bindings directly for $75 (with a huge discount!)
https://www.levelninesports.com/head-fr ... i-bindings
or through e-bay for $105
https://www.ebay.com/itm/Head-Freeflex- ... .l4275.c10
They have Level 9 ID number 36511, and manufacturer part number 100510. I have exact same bindings on my son's skis; I kept the original box and was able to confirm the manufacturers part number to make sure these are the same bindings.
I measured delta on my son's skis as 6.35 mm, according to the technical manual it is 7 mm. Close enough. This is the highest delta in adult bindings that I know of. I have, I believe, a year earlier model of the same bindings on my i.SL, they are also 7 mm delta. I do not know if delta has changed on newer model years of the same bindings.
Delta, in case you do not know, is the difference between the height of toe and heel pieces. The higher is the delta, the more the bindings push you into forward stance. With my height and long femurs, I had significant problems with the fore-aft balance. I learned, through trial and error, that I need at least 6, better 7 mm of delta. It is very common for bindings on the market to have a lower delta, e.g., 2-4 mm. With that, I was losing balance to the rear, sometimes big way, and had problems with black toes several times per season. Not anymore.
Knee bindings are also good in this sense, their delta is 6 mm. That works for me well, too, but nothing below that.