MFI have gone bust - In Administration sice Nov 08.
Will be difficult to find an exact replacement but if you can locate one it will likely be very cheap - or very expensive if lots of people are after it...
An alternative model from another supplier is probably your best bet, either that or get your existing one repaired.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix refrigerators.