Hans:
It's a little hard to tell from the pictures, but if your cabinet pulls are the plain, curved "50's Modern" type, they're still made and they're in every Home Depot.
I have them in my house, and when I moved in, the previous tenant had somehow managed to remove and lose one. My landlady was amazed when she saw that the cabinets had all their pulls once again - and matching, too.
The new ones appear to be the same die as the old ones, which means they're not so much reproduced as continued....
They're like a buck each.