Hi,
Just a thought. New Start Cat Rescue in Gloucestershire have a 5 year old male, brown spotted. He has been neutered and is up to date with his jabs through the rescue centre.
He is a beautiful big make and very very friendly. If I was in the position I would have him in a flash. He is quite vocal and dominant but I think your Mau could cope with that. He needs a home that understands the breed. Last owners gave him up because the neighbours complained about his talkative nature.
Please think about giving them a call. Gloucestershire isn't too far away from Wiltshire.
http://www.newstartcatrescue.org.uk07510134805