I knew I’d seen a thread on it! Good find.Here are the parts and a link to an earlier thread with photos. If you have a welding machine or access to one it would be an easy modification. You might even save some money paying a local welding shop to make you one or modify the existing one.
L60 Drop Drawbar option | OrangeTractorTalks - Everything Kubota
Kubota Accessories: DROP DRAWBAR FOR L5060-L6060, Part # L6850 (messicks.com)
Kubota Accessories: CLEVIS KIT FOR L-MX DROP DRAWBARS, Part # LMX6800 (messicks.com)