Hi Jonesy, I think you were very wise getting a new set of wheels, as from research that I have done, they are not being made any more. New reproduction hub-caps are sometimes available on eBay....I bought a set for my Victa 18 coffee table, and they fitted perfectly.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl