I have just (a month ago) done this job on "Possum" the 2014 Plus 4 Plus turbo. Not many years old and only about 12k miles I was not impressed by the definite lurch to the right -- The driver might be a bit of a porker but the list to the right didn't even recover when there was a passenger on the left and no driver on board. I'm told the springs were sourced from Sri Lanka by MMC and are, to put it mildly, not very good. I bought a pair of Sheffield-made "Morgan assymmetric anti-tramp springs" for about £280 inc vat from BCC (British-made classic car parts). I have no connection with this company other than as a customer. see
www.bcc-parts.com (01209 202820).
Unlike the regular Morgan springs these are stiffer at the front and can only be installed one way round. It IS a job you can do yourself but it's messy and unpleasant. The lovely people at Perranwell Garage (Morgan specialists) installed them for me and made a very good job of it for just under £300 inc vat.
Obviously too early to tell how the springs will perform over time but they feel very good -- and the car is level even with me in it.
Hope this helps
