For the flap linkageI useda heavy duty DuBro rod end. I glued a 1/8" plywood plate onto the stock 2 mm thick horn. This filled the space for the DuBro rod end. The link is made from 3/16" heavy wall K&S aluminum tube taped for 4-40 ends.
For the servo end I made new hatch covers and used Servo City
www.servocity.com/html/90_degree_universal.htmlmounts. The mounts are screwed to the cover with 4-40 button head screws. While the original would work fine, I like mine better. It took 1/16" and 1/64" plywood to get the right 2mm thickness.