I don't understand all the complications to this.
Here is how I handled mine and probably had less in them than this all will in the end.
1. Bought normal led bulbs. No load ballast. Just normal bulbs.
2. Installed bulbs.
3. Fired up pa soft and changed the setting for monitoring the bulbs for that circuit.
4. Enjoyed brighter angel eyes with zero hassles.
I did end up replacing the sockets on my second time messing with them since the insulation was falling off the bulb wires from all the heat that had been generated inside the housing over the years. But that isn't the led conversion fault.
So $20 bulbs or something for the first batch. Second ones cost more which were brighter but didn't really make the angel eye brighter since I had reached max light than ban be transmitted by the plastic rings.
You can get pa soft and cables off ebay for $13 to $20.
$40 tops, no hassles. Also you will have pa soft for later projects which is worth the price of admission anyways.
This is the link to the ae upgrade I did.
X5 Angel Eyes | Crowz Nest