you can get old of the MFA as a separate board housing the brain to the MFA and the LCD screen which is fixed to a small board, very tricky just to replace the LCD, if possible at all.
There was one on ebay 2 month ago and it went for a fiver, i dont think the seller knew what it was. there are a few still on ebay but the price has shot up to the ?50 mark.
You can either buy a set of MKI clocks or MKII with the one plug type on and remove the MFA from it. You will have to take apart the clocks but you can still use your original equipement once setup it is easy to do its more tricky getting the clocks out the dash first.
pick a set of clocks up for ?20, you can find some in scrappies for a tenner.
hope thats of any help.