jbaj007 - I bought some from Transpo direct from their US distributor, but they had a minimum order amount - something like $40, so I had to buy 4 (for my VW). They don't offer an adjustable regulator for the 143A unit I got so I'll see what the stock output is on that one if/when I get it installed. They do have them for my stock 70A unit though.
shawnster - No special wiring required. They are a drop-in upgrade. For your car, the best prices I've found are at
RallyLights.com . To improve on that further, you can get an adjustable voltage regulator and increase the voltage a bit (from ~13.6 stock to ~14.5), which will help, and/or install relays. A proper relay installation is very time consuming - took me 4-6 hours, including soldering heavy wire to my 500E light connector pin sockets. Relays will allow high-wattage bulbs but with E-codes lights, "+50" bulbs, and an adjustable regulator you may not want to bother!
Regards,