I have the same wheels, Jeff and I had the same problem trying to keep my trims on. The first thing I tried was to use those sticky pads for tie wraps, sticking 4 directly onto the solid wheels and the tie wraps thru them and around the trip. However, after a few wet drives, they still came off.
So I followed the advice of another member of my forum which was....
Remove the centre caps of the wheels and drill a 4mm hole in the exact centre of each. Feed a long 3.5 or 4mm bolt thru the hole from the inside and place a couple of nuts on to lock it tight. Refit the centre caps.
Drill a small hole in the exact centre of the wheel trims, fit to the wheel allowing the bolt to feed thru the hole of the trims and affix a couple of nuts to lock it on.
I've never lost a trim since I did this.
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