Ferguson 205 STA

[fx3278]

I have one of this Vintage Ferguson 205 STA receivers which has not been used for years. Recently I decided to see if it still works. Unfortunately the tuning has completely seized but the other functions such as the gram and tape work fine and the sound is very good. I had an engineer friend look at it and he said the tuning capacitor need's replacing together with the tuning knob as the original somehow got lost and has a replacement that does not work very well. Can anyone offer any advise to sort out the radio tuning problems.

Thanks