I still have the machine... And an instrution card I managed to obtain from a guy in California. 
I'll look through my e-mails to try and find his detials. 
I did have a contsct for a chap that was repro'ing the gumball parts... But I think he past away 
some time ago. 
Still haven't restored it. Could do with a piant job.. Might get motivated to do it now. 
Worst case senario I can scan the instruction decal in and send it over to you. Or if you are in no hurry 
I can get the man that does all my vending machine decals to sort it out when he gets some time. 
I don't have the frame it fits into but I was just going to put the decal straight onto the machine. 
I guess ours must have spent some time together in the past if they are both missing the same parts... 
Did you get it from Coventry?

? 
Dave