From my build notes: http://forums.hybridz.org/topic/83080-new-weatherstrip-alternative/page-1
The kits sold by MSA and Black Dragon were made by a company called "Precision". The fitment problems with the windshield, door and hatch glass were known for years, but MSA and Black Dragon continued to sell them. The two 240Z kits MSA sold me (12 years ago and 5 years ago) was actually for a 280Z so it had some extra parts in it that the 240Z does not need. I was was told that the 280Z door seals would work in the 240Z, but they were obviously too thick. I used cheap Pep Boys door seal instead. The above link gives a p/n for a McMaster pinch seal that works and is cheap.
Except for the windshield, door and hatch fitment problems the rest of the Precision kit seals worked fine.
There is another company (Vintage Rubber) that is making 240Z/280Z seals: http://www.vintagerubber.com/