"I need to replace the gasket on a GL1100 trunk"
The p/n you listed is for the Valk Interstate trunk. The trunk I have is from an '82 GL1100. The p/n 81420-463-770 is the one I need but two different dealers have indicated it's no longer available.
speedsupplies.com shows it in stock on their website. Might call them to check for sure 405-607-7777, they are in Oklahoma.
Thanks for the link. I also have a GL1100, but I need all three gaskets (both saddle bags and trunk). Checked the site, seems they only have 2 of the 3 in stock. Better than all the others who had nothing.
I was recommended to check out an autobody shop, but haven't gotten the bike on the road yet to take down and check it out.