You could speak to Mark at MK Motorsport (Flat Track on here) and see if he has already got the jig for one or if he will do a conversion. I expect he would fabricate one for you, especially if you went for one of his 6 degree beams and that would also allow you to use the bladed rear adjustable anti roll bar if you had the lugs welded on at the same time. (there is a picture of my beam at the top of this thread that he made for my supra diff)