Okay here's a link:
http://www.ddmtuning.com/ap55wwesa.html

However, I have a concern about these in the description:

It is a fully digital ballast and integrated ignitor design that has an analog under/over voltage input circuit that does two things. First of course, it senses the input voltage from your car and will shut the ballast off if the incoming voltage is below 9V or above 32V. Its second function is that as the lights are starting up, the circuit functions to act as a stand-in for the bulb during computer self checks. While this works on early detection circuits like those on most BMWs, there are some car makes like Mercedes and Chrysler that use more advanced self diagnostics and those may require the BOW-3 Bulb Out Warning Adapters. But when operating normally, the ballast is totally digital and works amazingly well with all the speed and arc control accuracy of a fully digital design to ensure long bulb life.

Is there a big disadvantage if these are not fully digital ballasts? (says they are but ...)
Does this mean they will flicker at startup? Eh, $40 bucks so can't expect much I guess.
BMWs don't have as advanced self-diags as Chryslers?!