Yes, it is possible to do an LPG conversion but I don't think you'd have much change out of a grand.
What I would do is sell it and buy either the 1.9 or 2.1 diesel Xantias. More reliable, economical and you can use a variety of fuels.
The XUD9 diesel engine is a superb unit from which these new HDi engines have been developed.
Hope this helps.
thanks m8 that does help, but its findin a half decent one for a reasonable price. the less than 50p a litre for gas has quite a lure to it which was why i was askin