MOT passed with the semi sealed units and H4 halogen bulbs. It was simply a case on replace the fully sealed units. It does mean I could have 2 side lights if I wanted as the semi sealed unit comes with a bulb fitted in the reflector part.
The MOT man showed mean the pattern in the testing unit and there was a definite shape and kick up towards the left as required. He was pleasantly surprised.
To RichardNZ - I had considered the double up of the seal unit and the fluted lens but was advised this will blur things even more. Apologies if I'm wrong but you drive on the left hand side too, in which case the set-up of the semi sealed unit with the bulb holder (see link above) is a good solution. If you have US spec lights, you can buy clear lenses and set the US spec side light to act as the indicator as you have a second bulb in the semi sealed unit. I didn't need it as I'm running with the wing mounted indicators. The one mentioned above allows you to use the common H4 Halogen bulb so that's cheaper and easier to find as well.
Cheers for everyone's help. Now to fix the leaking Jaycee Push Rod tubes
Cheers
Stuart