I may be interested in buying that Mistral from you if are willing to part with it. Let me know. I have some other irons in the fire right now, but in a week or so I should be able to give you my intentions.
I am willing to pay a fair price for some Burton plate bindings from the late 80s / early 90s that fit the 5 hole 'x' pattern of the early Burton boards. They do need to be in good condition with all important parts. I can get new screws if they are missing any.