there is liddington warren farm a couple of miles after common head roundabout aldbourne rd , sorry dont know the contact details . also kingedwards livery http://www.kingedwardslivery.com/Pages/default.aspx at foxhill and i think there is one in chiseldon down ladysmiths lane sorry again no contact details but think it is called ladysmiths livery , hope this helps
ladysmith's don't do diy. south farm in chiseldon do, medbourne farm in liddington do and there is also fern farm in bourton (as well as those listed above)