Looking for mice in Nottingham, UK!

Unfortunately my first mouse Charlie passed away recently, so i'm looking to get another, either a male or a pair of females. Charlie was from a pet shop and died very suddenly at 3 months old so I really want to avoid bad genetics by getting my second mouse from a breeder. However its so hard to find anyone nearby, especially as I can't drive and so have to rely on public transport. I have a cage all set up and can send photos if you want to check its suitable. Thank you, hope to hear back from someone!