I've never had to replace the rubber bits on door handles, but for the teardrop tail light rubbers, look here: http://www.mamotorworks.com/pc-2-102-2480.html
Poke around on their site - you may find all the other stuff, too.
Just bear in mind that Mid-America sells parts for original 356's, and what you need may not be quite the same as what they're selling.
edit: found the door handle seals: http://www.mamotorworks.com/pc-2-78-2505.html
Talking about seals, has anyone sucessfully used an original Porsche hood seal on a CMC body??
gn