As far as I've read...you can't replace just the lense. You have to buy the whole unit, and that includes both sides.
Check out collegehillshonda.com for prices.
Scroll to the bottom after clicking this link....
http://www.collegehillshonda.com/hon...ccessories.htm
$192 plus shipping. Ouch. But better than the GE prices.
Also, for the future--you might want to get some protection film. Search Foglight protection...there is a guy here that sells some or you can get some from headlightarmor.com (great stuff)
Hope this helps.