Hi Dahn,
I'm happy to help! The morimoto LED lights were listed on Theretrofitsource.com's website as a compatible with my vehicle (Subaru: XB LED - Fog Lights from Morimoto HID).
on my bumper, there was already a cutout for the fog lights, and the cover just needed to be removed. Installation was basically screw the bulbs down or use a zip tie.
I'm a little confused by your wording of "where did you find the housing to fit the projectors?". The housing is built into the bumper (including the attachment points), and the projectors (I think you mean lights) are the fog lights listed above.
Let me know if you need any other help. I'm not on very often, but very enthusiastic about my forester
. Good luck and let me know how it turns out!
-Turner