Hi, not sure if this would work for you but back in the 70's when I made alot more farmers style hard cheese...my late hubby used a contraption that he used for siphoning 50-100 gal. aquariums. He made the length of the draining tubes so they fit the size of my largest enameled canner...I suppose it could be shortened more.
It was based on a hand kerosene pump/siphon from my memory. I'll add a website that has something similar...but the one he used was handmade for his purposes.
http://www.acehardware.com/product/index.jsp?productId=1278396 The one we had was a thing with a stiff wide (3/4-1in) tube with a cut angle to the end of it that went into bottom of curd pot. There was a smaller flexible tube that drained the whey into a bucket or pot. The one at this web link shows a flexible accordian tube which wouldn't work for cheese...but you get the idea. He used his own tubes and a much larger rubber bulb. The siphon was started by squeezing the collapsible bulb a few times. I used to think he was a bit touched with some of his solutions...but it worked for what we needed which was simply to remove some of the whey. The trick was to put it against the side of the pot...not into center of curds.
It worked...of course it took a bit of practice...he was able to get whey drained quite fast and without disturbing the cut curds much. That was his job...that and carrying the large pot around...LOL. The design of this thing kept the whey out of the bulb. I was able to clean and sterilize it with bleach water. It did require a good handmade bottle brush.
There is another option that I saw today on an aquarium web site...I think the pic will give you an idea. I personally don't think I'd use it because the hand bulb would obviously have whey in it...whereas the one we used the whey did not get into the bulb if done properly.
http://www.petsolutions.com/default.aspx?ItemId=94001319&EID=NX94001319&SID=NXTG