I started a thread about this type of thing but it didn't catch on. It would appear a lot of the parts that are NLA in the US are still available via a Stihl dealer in the UK (not old stock). http://www.arboristsite.com/chainsaw/164826.htm
Most dealers will say the are on the list(assume it is available) but if you order it, good chance you will never see it! Parts are left in limbo till Stihl finally says NLA! The last one I got were $50-60. OEM on eBay go from $60-80 new, and used go from $40-70