http://www.striped-bass.com/Stripert...ommitizer.html
here is one G did several years back.
I just drill holes a small amount under the size of the grommet into a 3/4" dia. piece of stainless steel and insert grommet and then use a rubber hammer to slam them down into shape. Lu has a similar one but uses a mating piece over the 3/4" dia. piece so he can slam a few down at once. All work. Very simple. If this is not sufficient I will take some pics on Wed. and post.