I have one of those red and clear plastic things (not like the one in the link but more like the ez pumps)
I got it free with a drum of meth, and its.fine for the job. In addition, the fluid can syphon through the pump which is nice when emptying a drum into 25s (until you get down to the last 50 ltrs or so, but then the drum.is light enough to lift anyhow - or you can pump the last out if you're not in a rush / kerbside)
I don't know where you buy them.but I.would check.local auto parts places.