If I remember I will post it when I get home.   Unfortunately these rarely come up NOS.  You are better off seeing if MAP351 still makes his reproduction from Fiberglass.

Sorry, I forgot last night.  You know, your valance does not look too bad to me.  It looks to be in the same shape as the one I have currently on my car.  Mine too is missing the lower tabs.  I took some scrap sheet metal, and cut some pieces about the same width as the lower tabs.  I drilled a hole for the bolt and I overlapped the sheet metal over the remaining piece of the plastic tab.  Basically sandwiching it between the sheet metal and the core support.  Hopefully that makes sense.  I have been running mine that way for years with no issues.  My son has a baseball game tonight but I will try and remember to get you that p/n after.