Car Forums - mercedes 207d motorhome

hi we have got a 1989 207d motorhome (cast head) and need to put powered steering on it at the minute my mum (62) is suffering with the heavy van and has stopped using it now till i can get this sorted out.i guessed when we got it i would strugle to find parts because they have mostly been exported as far as i am aware but shorly someboby has this stuff on the shelf or has a 208/310/410 with the hole set up on just rusting away some ware,i just need to find them.has any body got a powered steering box,or know where there is one because i have spend 6 days on the phone up and down the countries scrap yards being told they are all in africa and russia please please can any body help us so i can get my mum out and about again? i am in coventry westmidlands. my contact number is 07971 55 86 95.
cheers boyce.:confused::confused::confused:your help is needed.:)