84 & 91 mm Nylon scales are hard to find. Back a few years ago Swiss Bianco sold them on his website so I bought several in both sizes in red, black & blue, so all my users have nylon scales. I also have an Economy Recruit & Tinker. I just ordered a set of checkered nylon (?) from Etsy for a 91 mm. Hope I like them as well as economy nylon.