Angus has successfully fitted the new windscreen and Pilkington Classic has issued the following new part numbers:

CL= clear; GN = green
You can contact Nick Gardiner directly if you want to order one or do so via a Pilkington Classic supplier:
Nick.gardiner@NSG.Com
The period Triplex logo was in the correct place. Angus did find that one rubber seal he had in stock, from an unknown source, made fitting difficult. A known source seal (from Hutsons) fitted perfectly however so be aware all seals are not created equal!
Although I have not fitted my drop glass as yet it looks to be a superb product with a discrete Triplex logo rather than the hideous white 'Uroglass' makings on the currently fitted ones.