Roof Door seal replacement.How?

["netym89" <delorean@xxxx>]

When I bought my Delorean six years ago, I realized that after an 
inspection, the rood door seal and the retaining plate were removed 
by the previous owner. I found them in the trunk. Because it is held 
in with rivets, I noticed that the rivets are in the door and I don't 
know how to go about it. Must I drill them out and replace them with 
new ones? Do I knock them into the door with a hammer?Not my first 
choice. So here, anybody that has replaced these seals, I need to 
hear from you because your advise will help me do it the right way.
Talk to you soon.
John
10250