I had the same problem, although a bit less extreme maybe. Got new engine mounting rubbers and that made the difference... so check them too...
the 'fluid' leaking... is that engine/gearbox oil or clutch-fluid?
If there's oil leaking from the bell-housing it's probably the rear crankshaft- seal...
Why not leave a message on the six-pot forum? Guess there will be people interested in buying it for spares... I would if I was at your side of the channel :)
Carawagon And Six Pot Association Forum - Index
Cheers
Harro
The Netherlands