Mine is from KD benches in Scotland. £345 delivered, I added the front wheel clamp option too which took the total to £420.
http://www.kdbenches.co.uk/
The trolley jack is included.
I found slightly cheaper ones on ebay but I guess they are made in China like everything else. I try and buy British when I can. They were good to deal with and the delivery turned up when they said it would.
The cheaper ones often have a lower weight rating. This one is up to 450kg.
This is a nice product. Wooden surface is just a bit nicer to work on than steel.