I'm a bit confused by your question - there should be an amber lens in both litronics and non-litronic headlights, assuming they are "clear" headlights from the later years. Are you trying to practice on one of the older, amber, non-litronics? I don't think those have a lens that you can use to practice.
I was a little scared when I did the amberectomy, but I didn't have too much trouble. I just sliced up the lens with my soldering iron and pull out pieces with a pair of needle nose pliers. Just take your time!
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