Yes, All race cars have zip ties!!! and I almost did that myself but took it a step further...
(I spend an hour getting the plate and frame to sit right (after the 3rd frame was purchased)
...Cut a mm from each side of my lic plate off and then wrapped just the edge in black vinyl so you cant see it on the side of the frame from an angle!!!! YEAH I GOT PROBLEMS!)
I am not selling the fasteners, but do have a bunch of extras....Someone just PM'd me and asked if they cover shipping if I would send them?.....Yes, no problem.