I remember over at Classic British that the late Garry Russell had the basics to do an Argus as part of his Britannia/CL-44
series that he was working on.
IIRC,the Brit was released,the CL-44 was released as a nearly finished project shortly after his death,it was certainly useable and I think,
Pete Watkins or the boys over at Cal Classics did some paints for it,I do know Leif Harding had a lot of input based on his experience
with CL-44's.
As far as I can remember,the Argus was certainly planned and some preliminary work done but I don't think it got to the "alpha"stage
really.
It might be worth a shout over at CBFS to see if anyone still has the files and would be willing to pass them over for work on them.