I did consider a couple of conversions a while back - and even acquired a couple of suitable Harris tweed jackets for this purpose - but I started wearing the jackets as is (typically with jeans and shirt) and decided I would get more use of them that way - and given the short comings and cost of conversion - other than having a couple of tweeds I really liked, I decided I wasn't making much of a saving.

So I ended up buying 2 or 3 Argyll Jackets and Vests when they were on sale - the cheapest was only £50, the other two less than £200 (all brand new) so it's perhaps worth shopping around. I also found a kiltmaker, whose costs for tailoring (with me providing my own cloth) was £155 for a jacket and £45 for a waistcoat.