Hi
If yours is a 79 car, then I really would look to let in new metal and restore to original, then use an original bonded screen and get a specialist screen fitter who has all the tools and bonding materials to the job properly, e.g. They put a coating of special paint on the glass to allow it to bond correctly.
I guess you could go for the removable seal version, but the seals are expensive and there will likely be more difficult to source the screen as it was only used for a few years.
Not sure if you saw the PM I sent you re a second hand screen, but I did not get a reply.
Peter