They are hard to find, but still available. Check out 1stvwparts.com a US site.
The part numbers below are for a 1993 cabriolet with black side trim.

Left Front : 171853507E JA2

Right Front :171853508B JA2

Left Door : 171853515D EG8 ?

Right Door : 17185351A JA2

Left Rear : 171853535D JA2

Right Rear : 171853536A Ja2

Hope this helps with the search! Please double check part numbers before you place an order.

Michael