Caps and studs wouldn't be hard to find.. These should go on a 116 no worries yeah?
http://cgi.ebay.com.au/Mercedes-Benz-Wheels-suit-W126-models_W0QQitemZ150236153341QQihZ005QQcategoryZ43953QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.com.au/Mercedes-Benz-Wheels-suit-W126-models_W0QQitemZ150236153341QQihZ005QQcategoryZ43953QQssPageNameZWDVWQQrdZ1QQcmdZViewItem