Yes your right, wonder why they didn't make a Freelander v6 manual
I think LR missed a trick there. I suspect it was a tooling issue. It would have ment making another gearbox bell housing.
There are 3 manual boxes fitted to the Freelander. There's two PG1 boxes. One for the 1.8 and another one for the L series diesel. The diesel box has uprated shafts and bearings to handle 177ftlb of to torque. The standard 1.8 PG1 is only designed to take 130 ftlb.
The TD4 uses a completely different box altogether so is useless for a manual conversion.