Hint: Many of the "cheaper"(econo) lines of chevy/GM vehicles had 5x100mm with a 57.1mm bore, just like your VW, starting back in the 80s right up until mid-2000s.
There's lots of them. Chevy cavalier, Beretta, Corsica, etc; Pontiac Sunfire, Sunbird, Fiero, etc. Etc, etc.
Plus! Chrysler/Dodge used to use the same in the 90s. Lebaron, shadow, etc.
Here's what you need. A proper list:
Wheel Bolt Pattern Cross Reference Database and Conversion Guide: 5 X 100
Just makes sure it has the 57.1mm bore (or bigger) before you buy any. And ~ the same level of offset. (They should almost all be "high" offset anyway)
I have '00 Cavalier z24 16" wheels on my Fiero. They will swap right out with my Jetta's.