Well the main reson they can't find the lens you speak of is because it has never been available. The entire light assembly must be purchased and they are very expensive and getting more so all the time. E-bay has always been a good bet so you need to keep checking there.If you can't find one in the next couple weeks get back with me I may know of one but as i said it isn't cheap so prefer it if you try to find one elsewhere first.
Montana