some clear turn signal bulb covers?

I'm wanting to perform the koji mod to my 02's headlights (i hate the "chrome") and I would like to remove the orange bulb cover and replace it with a clear cover/orange bulb (i think it looks cleaner).

I've seen these on the ebay "euro" headlights
Anybody running w/o the bulb cover and just using the bulb?
Will not using the bulb cover allow moisture into the housing?

My plan was to make them look like these http://cgi.ebay.com/ebaymotors/02-03-SUBARU-IMPREZA-WRX-BLACK-HEADLIGHTS-HEADLIGHT_W0QQitemZ150072906429QQihZ005QQcategoryZ 33710QQrdZ1QQcmdZViewItem#ebayphotohosting

Thanks for any help