Source for trim rings.

OK. I've already got some tweeters from Polk that I want to mount in my doors. Unfortunately, the door panel is fairly flush with the interior structure. So the tweeters will have to be surface mounted. The tweeters came with a surface mount but it doesn't quite cover up the existing hole from the factory tweeter. I tried to separate the factory tweeter from its trim piece but that was a failure.

So does anyone know of a source for buying a plain old trim ring that I can use to make fr a nice looking installation?

Thanks,
MW  

Wow! Not one suggestion in 15 days. I'll have to find another forum I guess..