I don't know where you're based captain, but Milweb has links to as many international dealers as you'd need:
Military vehicles on Milweb - marketplace for Jeeps Tanks Military vehicles,services and equipment
And Jeeparts (I think based in Holland?) can sell you parts to build an entire one from scratch if you so desire:
Jeeparts UK
The British 'Classic Military vehicle magazine' has just run a feature on buying Jeeps over the last two issues (August & September) :
Classic Military Vehicle Magazine
Also, this place is full of chaps that can guide you in the right direction with some real experience:
Historic Military Vehicles Forum - Home
Cheers, (and good luck)
Adam.