The threaded adjusters are easy to make by welding or brazing a length of one quarter inchx26tpi studding or an old bolt, onto a suitable thick washer, but the pressing that goes over the rear fork end of the frame is quite another matter!! Something that will do the job is easy to make but it won’t look very elegant unless you want to spend hours and hours with files etc.. We ought to get a small press tool made up to do the job properly. If someone can do that, then make and sell a small batch of pressings to reward their efforts, perhaps the tool could then be passed on to the Spares Scheme for future batches or its existence published in Yowl so that everyone knows about it. I can lend a sample to anyone interested.
