tomslik - I don't have a COE but I can tell you what I used on my 46 1/2 ton. The trim strips probably connect the same way. Here's what you do if your tirm has a channel on the back side and the grill just has some slots for connection points. I went to the office supply store and bought some of those old fasion brass paper fasteners. You know the kind with the round head and the two legs that get bent over to hold the paper together. These come in different sizes so you will have to take a piece of trim with you when you buy them to make sure the head will slip into the channel. Slide these fasterners into the channel, trim off the legs a little line up with the slots and use a pair of needle nose pliers to roll the legs back to hold on the trim piece. I also put a small washer on the fastener first to make fit a little better in the channel, I think it also holds a little better.

This is a little long winded, I hope it's clear what I did. The only other option is to search and search and search for the original clips which cost a fortune if you find them.

Good luck
George