I have a KPX7 Hanmey Backhoe I purchased in 2010. I see signs of the hydraulic cylinder seals wearing out. Does anyone know where I can get cylinder Kits for this backhoe? Backhoe was purchased from KPX in Phoenix as a KPX7-3 and made by Hanmey. The backhoe is also sold as a Hanmey BH series...