here is a website you can check out, you might contact them first to get the specific dimensions of the grommet, says its for a 67-72 truck, it would be the second one down on the page.
[url=http://www.classicheartbeat.com/rubber_&_weatherstrip.htm]http://www.classicheartbeat.com/rubber_&_weatherstrip.htm[/url]
i hope that helps you out, I'll keep searching for a little while if i find something specific to a 54 i will post again.
