Lifts up to 500KG. I think I paid around £80 for mine with £10 P&P from a guy in Nottingham (Ideal for Mr Whatton). I looked out his website and he doesn't list them there but you could drop him a line. http://www.forestedge-retail.co.uk/index.html
I made one from scrap sqare tube and angle and an old bottle jack. It lifted an electra glide(can I say that on here). I think you need a cradle to carry the motor / gear box suitable for the Cof G. I think I have plans somewhere.
The one in YEAHBUTS photo is an Eazy-Rizer from www.on-bike.com. Got one myself for my cafe racer project but not yet dared get the GS up on it! Not cheap at £300 or so but if you haven't got the room for a table hoist they do the biz. Just an art getting the bike onto it before hoisting!