That looks like the piece that goes across you front header bow on your convertible top. as for the grill I think the was plastic clips that went in the holes. but I used some new metal ford clips
The clips that hold the lower front grill in are a "W" shape and have a pink plastic scew retainer/clip I have spares of them if you need them. matt.scarton@gmail.com
Matt any chance you can post or email me a picture. Chances are I have the part in one of my zip lock bags if I knew what to look for. dprice at plugnpay.com