Don't know if either of these guys are good at weatherstripping, but Jeff Roddick has a buick repair shop.
Trackside Automotive Inc
343 SW 14th Ave
Pompano Beach, FL 33069
(954) 946-4043
In Palm beach is Dave Maharaj, he does a lot of interior work, so he may be detailed enough to do a good job at this sort of thing. If you see his and his brother's GNs you'll understand what I mean. Dave's brother Shev is on here as ULOSE2A6. I have a number for dave, but I don't know if its current. 561.547.0460