I have forwarded your message to Lorna (nee Wenban) in who now lives near Brisbane and she is daughter of Ray Wenban. She may be the Lorna to whom you refer.
As to visiting Wenbans house this is in private ownership and visitors, Wenbans or not, are not welcomed but it is the house from which the whole family originated. You should look up the web site of Wenbans put up in Oz by Myles Wenban for more information. Other Wenban genealogists in Australia will probably respond to your message.
Peter Wenban / Suffolk, England