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Sorry, did a search on HID and stumbled on your post.
Looks like you have a HD Part number and it might be the same as my HD HID kit.
The stock lens is a H4 bulb. [I believe] The easiest is to look for a non-HD HID kit and replace the bulb, and look for a slim ballast.
Another way is to look at the dual bulb Halogen kit, and buy HID bulb and ballasts for them. I'm looking into whether this is brighter than my next suggestion:
HD LED. $400 US. the latest and greatest from HD. Not sure if they are brighter than HID.
Ask around, and post in the Touring forum perhaps. The general BS is for other stuff.
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