For you guys with D1-5 machines, there is a D1-5 Four jaw chuck on Facebook Market place in Highland CAYes, what Ted said. D1-5 is one step away from unobtainium. d1-6 lathes, chucks, collet chucks, and don't forget faceplates, are much more prevalent, both used and new. Plus, if you want to sell your new lathe in the future, it will be harder to find someone intersted in the D1-5 setup. (I have a d1-5 lathe and it's been a battle tooling it up)
Glenn