Oversize Shrouded Timing Nut

I have several of these brakes and they come with the Timing nut for Ultradyne brake and diameter of the bbl selected, as well I use this shrouded nut for a couple of brakes that are not self timing . They are great ,look clean and do the job well . They could make a dime or two if they made stainless shrouded jam nuts. cant find any on the net that are available for different barrel diameters and only one other company that makes a shrouded Timing nut