There's an LHD Auto in crabmart in N. Ireland but you'll need to restore it first so probably not viable at this stage. Otherwise the most likely places for one to turn up will be Denmark, Sweden and possibly The Netherlands. Patience will no doubt be required with this one. As an interim I saw nice early Rover 75 LHD on autotrader the other day with a low asking price.
although not first priority, I would be selling one. It is persian blue, LHD, auto, black interior - currently wearing a Morris grille, but originally an Austin Mk2 from 1968. it is generally a very good car, the body is all good and mostly (or even completly) original - I am not aware of any welding, but have not really searched very hard. The downside is, it is parked up since nearly 10 years in a very dry place. It was driving well before though. Basically I had the car resprayed, a dent in the front wing straightened, fitted the best interior I had, bought new carpet - and then put it away, not thinking this would last 10 years!
It has not got power steering though.
So, if you have some interest, please get in touch with me...