Little bump for this thread...
So I'm assuming from the comments here that replacement rubbers/seals for the window/door join are no longer available? My driver's door looks worse than the OP's first image, in fact it's split entirely at the end near the door handle. This is obviously not great for driving in the rain or worse, washing the car.
Are there not 3rd party rubber strips we can get? Or bits from other Alfa's (or even other vehicles) that fit the bill?
Is refurbishment/repair the only viable option? If so, therebelmc, can you provide some pics and a run-down of what you did, with some links to this 'bridge building' rubber?