SMEG!!
I'm putting my doors back together and I'm told that these are NLA by 3 suppliers including mittlemotor.
Are there any sources in the US?
Also need a windscreen lower seal which is also NLA...has anyone installed windscreen without it?

Yup, sorry man. GWN7 was lookinginto doing them, not sure how it paned out.
I have yet to install my inner windshield seal...not even sure what it is for other than looks. I did get the seal from AA (believe it or not), but it was when Greg worked there and I bought through him. It was not expensive.

I bought both of these parts thru local Porsche dealer within the last year. Get ahold of Eric Sanders and see if he can't get the parts for you. His tag here is Partsman.

The problem with these is the two angles in the "legs" The legs are so thin that any air in the mix creates holes and the angles trap microscopic bubbles which gravitate upwards as it cures. Problem hopefully solved soon.