Boneman may not be on this site much any more. I haven't seen him post in quite a while
I have the 2.5" projector. I don't think the 3" would fit. it may be too large.
Go with a mini H1 projector. these are 2.5"
You can go with an Ebay kit
Stone 2 5" Mini HID Bixenon Projector Lens for H1 Bulb Car Gift Chrome Shround | eBay
or go more high end with a Morimoto kit
Bi-xenon: Morimoto Mini H1 6.0 - HID Projectors from The Retrofit Source Inc
Honestly all this stuff is made in China. you can source premium AC digital ballasts on Ebay for much less $. I am running these ballasts on both my car and bike and they work well.
1 Pcs Ultra Slim HID Xenon Premium Digital AC Digital 12V35W Replacement Ballast | eBay
Make sure you use a relay harness.
This project will take some research and a good bit of patience but the results are worth it
Hit me up with a PM if you have any questions