After years of searching, we have finally sourced a un-plated brass 1/4" quick disconnect terminals which are visually and functionally equivalent to the terminals used on the original Volkswagen wiring harness. Don't use an ugly hardware store terminal again! Our terminals fit all 1/4" OE wiring connections. This kit includes:
 
22-18 AWG quick disconnect terminals, with and without locking lance (10 each)
18-14 AWG quick disconnect terminals, with and without locking lance (10 each)
18-14 AWG piggyback terminal (5)
Female to dual male piggyback connector (5), no crimping required
 
We recommend a ratcheting-style crimping tool to install these quick-disconnect terminals.