Krone disc mower blades

I need an economical place to get blades,parts,etc for a krone Easycut 3600 CV disc mower conditioner.i do mostly road ditches and go through a fair amount of blades.after markets are a little too short at 4.409 inches and the factory part number 139-888 left hand and 139-889 right hand are a little longer at about 4.625 ...no dealer very close,want to order a box of each and spare spring loaded bolt kit repairs etc.any ideas besides ordering from closest dealer?anyone buying overseas direct?please and thanks,Jimmy

Krone disc mower blades