Hi Ash,
What mirrors are you using? Is it due to the size of the mirror - ie just above mimimum size so it's legal but limited view (the problem with a lot of aftermarket mirrors apparently). Guess Dogwood could be right on this and just get a mirror that'll pass then switch it out for the one you have
A good fail though as the rest of us can pester the suppliers to supply mirrors that actually work!
Attached - hopefully - are a couple of piccies - one is of a cable gland cover used on the track rod end which looks very OEM and should be available from most good electrical factors, the other of the Tiger lower steering column arangment and below it in that image is the Truimph Dolomite (I think - I'll have to check) lower column which will fit the Escort rack.
HTH BV.
Correction the steering shaft mentioned above is a TR7 lower column shaft available from rimmer bros. Part No. TKC1084