Having owned and driven a N/A Freelander for about five years, i thought i might offer my opinion on the vehicle and what I know of accessories available for it.
Capability Off-road:
The Freelander is amazingly nimble for a vehicle of its design, meaning one without any serious ground clearance or a low range transfercase. It is assisted by a traction control system and an amazingly stiff frame that keeps things from tweaking when stressed in cross up situations. Its great in the light snow, icy conditions, or on a fire road type trail where you may encounter some slick mud, loose leaves, or other loose footing.
It is incapable of handling anything strenuous without attacking an obstacle at relatively high speed to keep its momentium going, it lacks torque. its lack of ground clearance makes it incapable of overcoming any obstacle bigger than about 8" w/o stacking rocks and/or risking expesnive damage.
Reliability:
N/A Freelanders with the gasoline V6 engine are plagued by transmission failures, tramatic coolant loss resulting in engine failures, and/or heater-core failures. They are also prone to a variety of lesser issues like window mechanism failure and like most LRs, some quirky electrical issues.
Expedition Accessories:
A company in Vermont called
DAP makes a nice pair of rock sliders for the thing. I found these to be the best money I spent on the rig.
DAP also imports a small lift kit from Bearmark for these.
Safety Device did make a nice roof rack for them, I don't think its sold new in NA any more, but you might find a used one as folks are dropping these things like hot potatos as soon as they drop out of factory warranty.
There is a engine sump skid made by Mantec, I bought mine form another owner and I don't know where you might find oen now. It's pretty beefy and replaces the plastic one that came from the factory.
Tome it was a very comfortable car to drive vs a Disco, but with all its mechanical problems and off-road shortcomings, I too would suggest looking at something else.