Sounds terminal mate. You might be able to find a secondhand engine "cheap" but it's the labour to do the swap that's usually the killer.
As far as sourcing an engine, you should also look for 3.0L V6's from the X-Type and X350 XJ. You'd just have to swap over the intake manifold and maybe the anciallarys (water pump, alternator, etc.) The long motor would be basically the same. Maybe have to change over one of the heads if you get a 3.0L from an X-Type, i recall something about head changes, a pump or something was driven off the cam due to the different layout on the AWD models. Oh and you'd have to swap the oil-pan & pickup if you got a motor from an X-Type.
TBH a 2001 S-Type V6 won't get you much as a non-running wreck. If it were me in your shoes, i'd be looking at an engine swap & doing the labour myself, if you have the tools & a place to work. It's just a question of money, and the labour is the only thing you can really save on.
As far as sourcing an engine, you should also look for 3.0L V6's from the X-Type and X350 XJ. You'd just have to swap over the intake manifold and maybe the anciallarys (water pump, alternator, etc.) The long motor would be basically the same. Maybe have to change over one of the heads if you get a 3.0L from an X-Type, i recall something about head changes, a pump or something was driven off the cam due to the different layout on the AWD models. Oh and you'd have to swap the oil-pan & pickup if you got a motor from an X-Type.
TBH a 2001 S-Type V6 won't get you much as a non-running wreck. If it were me in your shoes, i'd be looking at an engine swap & doing the labour myself, if you have the tools & a place to work. It's just a question of money, and the labour is the only thing you can really save on.