Since you are looking for used....
The L30 Series had a mid PTO option - these tractors were manufactured between 2003 - 2006
It look slike the Mid PTO kits are still available from Kubota for
L4330 - 43.2 HP - PTO Kit Number L8313
L4630 - 47.2 HP - PTO Kit Number L8313
L5030 - 52.2 HP - PTO...