For the indicator lamp look here..
http://www.ebay.co.uk/itm/Lucas-L691-Amber-Flasher-Lamp-for-Triumph-Imp-Healey-Scimitar-Morgan-etc-/200861974698?hash=item2ec44e80aa:g:RIgAAOSwe-FU6GUF
Is this not the correct Filler pipe ?
https://mogparts.net/index.php/engine/fu...-7-1997-on.html