The elcandr.zip file you have requested: Shadow of Chernobyl / Mods / Singleplayer / ElcanDR - 977.58kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R. Shadow of Chernobyl and upload any files you want to share or are missing. This is the only information we could locate:
A simple texture for the ElcanDR scope. It can be used in place of any scope you like but is most suitable for NATO weapons. The real scope fits a standard Picatinny rail.