Haven't spoken with Ian for a while but, as far as I know, he still lives in Melbourne at the same address as when you lot were wading through the Nimbus courses down at Noel's place at Essendon and elsewhere ......
I have no idea if he plays on PPRuNe but I suppose I could give him a call and invite him to respond ?
... actually, they started out in the late 70s .... all seems so long ago, now .......