Basically, if you go on ebay and do a search, a lot of different types come up.
It depends what you need, I'm currently looking to get one and there seems to be a 2 main types based on lifting capacity of 1 or 2 tons.
Engine and gearbox for NA Esprit weights about 250-300Kg, so there should be plenty of capacity.
http://cgi.ebay.co.uk/New-National-NC10-Se...2|39:1|240:1318
http://cgi.ebay.co.uk/2-TON-FOLDING-6-WHEE...2|39:1|240:1318