Problem is his is the TLB backhoe version. I have found one from an l series that would work for 3 point, and position control. The issue is how the front of the housing is machined. His machine has a double stack hydraulic feed that the prior is not machined for.
DRAGOK, do you have the broken off part (pic)close up? I have discerned the front O port flange pipe goes to the loader circuit, the rear O port flange is the feed in to the system from the front main implement pump. The two bolt flange pipe is the feed to backhoe. They reversed this pipe as a pb instead of the delivery on the regular L.
If the castings are the same, the part can be finished/machined to accept the feed.
All the l 3300-3710 look similar to these pictures with a single hydraulic feed.