I don't know about this one... Those garden-type accessories are always accompanied with strange smells which might affect your cider. I'd also be worred about the acidity of the cider with whatever plastic they are using.
I don't use them for brewing (Fish pond filters) But i got five 55gallon food safe barrels for free from a nearby coca cola plant. They are used to store flavoured syrup.
All I did to get these was call them and ask them nicely. I had to pick them up myself of course, but maybe there is a similar kind of place near you that might use these?