I have no idea, but the binding works just fine without that part, I think it is only there to help center the boot for step in - though the step in could be a bit more fiddly - i dunno.
Also, it could be worth checking out if BD will warrenty that toe - they seem extremely easy to deal with. It could be that the worst case is a new toe at cost or something. I dunno - if you do not get a new toe then I would not personally have bothered to spend money to replace that toe. :)
Yeah, so in soft snow tech toes do fine. In variable, icy or windblown/tracked out snow they are noticeably harsher. But that is the trade off - elasticity for weight :) I have been considering remouning said BMT90s ATK Raider 12 2.0s to save weight, but now I am glad that I did not get around to doing it. The ski/binding combo is light enough and are awesome in use.
I based my numbers on this list:
https://www.evo.com/guides/alpine-an...inding-weights
I have not measured any of my bindings that I can remember, so I have no idea if the numbers are correct. :)