Plz halp - cheese wiz recipe?


Usually in the past when I’ve tried to make a cheesesteak over here in the UK I have just got hold of some provolone and rib eye and done the best I can... I don’t think actual cheese wiz is legal produce in UK/ EU because of laws about what ingredients can and can not be put in food here. Took the mrs to Passyunk Avenue in London and we had really good cheesesteaks with home made cheese wiz. Now the mrs is jonesing for it. Do any of you know or know anyone who makes good home made cheese wiz?