I assume you're talking about the stock WRX projector? The clear lens will do nothing to make the projector better. Hell it will make the glare even more apparent.
You're not going to get the width you want from it as a fog light. I just did an STi retrofit and took some images for comparison between the stock halogen projector and the STi projector. Even with the shield down and with a clear lens on the WRX projector, there's still weird glare coming up the sides, I assume from the non-ideal optics and then the flat shield. The width also sucks.
After the STi retrofit, I can say I really don't need fogs, as the width of the beam is actually pretty ridiculous and more than I thought it would be.
TRS took down the Matchbox projectors from their site, but apparently they're coming out with a sealed version, from what I hear. You might want to check them out when they're available, which is supposed to be in the next few weeks/month...
EDIT: It might be a while longer for those new Matchboxes: http://www.hidplanet.com/forums/show...box-projectors