If you choose to make a custom grills for the rear deck, here are few steps that would guide you through this rather simple process.
Tools and materials needed
Quarter round or what ever shape wood base molding of your choice
Carpenter’s glue
3M spray adhesive or alike
Grill cloth
Small wood screws (for securing the grills)
Screw driver
Frame angles (recommended for true 90 degree angles)
Files and sand paper for finishing
Measure and cut the frames to size
Using carpenter’s glue and frame angles assemble the grills
Let fully cure
Using file, round off the corners for smooth appearance if you wish.
Precut your grill cloth ensuring there is enough edge to fold under the grill
Spray 3M adhesive onto the grill, let dry for 7-10 minutes (or as directed on the can)
Apply the grill cloth stretching it firmly over the frame.
***You may wan to practice the stretching prior to using the spray to get a good feel for the material. It also helps to have two people in this step, while both of you holding the material from each end, ensuring the even stretching as you lay the cloth over the grill.
Trim off any excess material, ensure that the cloth is tucked and glued neatly under the frames.
Finished grills attached from the bottom of the deck or glued from the top – your choice.
Hope this helps