Now I an not a total expert in this field but here are some information I have picked up over the years..
First A310 alpines used RHD Simca 180 Steering Racks for LHD cars, alpine turned the racks upside down... I found this out as I am having to convert my A310 from LHD to RHD and bought a Chrysler Centura RHD Rack and it was the same as the LHD rack from the A310...
http://www.valiant.org/centura.html
http://www.allpar.com/model/simca.html
http://www.rootes-chrysler.co.uk/car-de ... v-180.html
I was then told you have to get a LHD Simca Rack to make it RHD... which I have yet to find, alot of the early A310 conversions in australia were done with LHD simca racks as you could still order them from Chrysler
Recent conversion here have been done with RHD Ford Cortina TD racks as they are similar... I wondered in Escort quick racks or a Ford Cortina quick rack was ever sold in the UK... put I have no idea there either
I hope this helps... it's limited knowledge I know, but maybe some of the UK or Euro dudes can shed some more light on simca 180 LHD spare parts places etc...