Good luck. I don't think one is made either in diecast or plastic kit. The only plastic kit I know of is the 1/72 Hobbycraft of the series 100, An example is viewable here:
http://modelairliners.hypermart.net/...ct_Code=HC1345
Hogan and Long Prosper had nice pushfit examples of the series 100. I have one in British Airways livery. But they are in 1/200.
Good hunting.