Replacements are almost impossible to find at anything close to a reasonable price. I've been looking. Have always greased with the zerk on the pto drive but this year I removed that to take a look inside. All was good. Shot some grease down the tube, reinstalled and greased with the zerk. Should be good for quite a while. If anything happens to that, the plan is to attach a rear pto pump with an aux tank and go that route. I pretty much only use this tractor for snow removal anymore.