HD lenses work fine, I have the smoked version lenses on all 4 corners of my bike.
They sit a little proud of the housing but I've never had trouble with water getting in there.
The bolt holes are exactly the same so they just pop right on.
My guess is if you don't go underwater they'll be fine.
I got them (all 4 in a set) used on CL for $8.
Here's a pic of them: