Pump Sets
I don't think that any old pump set will work, not unless your into modifying things..
As to sources, most medical supply retailers can either get them for you or might even have them in stock, however, the price will be outrageous! It is after all a piece of medical equipment.
I bought mine on Ebay, just do a search and make sure you get pump sets for the Kangaroo.
I think I paid something like $45.00 for a case of 30.
IF you are you are going to use a jug, Kent AquaDose etc. to hold your solution, then it doesn't matter what "size" pump set you buy, i.e. 1000 cc/ml or 500 cc/ml, since your going to modify the set anyway (see my instructions in the original posting).
I bought my pumps back in June, and I'm still using the original pump sets, which have been running 24X7 since that time. The only thing I have done in that time is to rinse out the pump set for the ALK twice with vinegar due to clogging (just pumped a 100 cc/ml of vinegar through it at 300 cc/ml).
In a nutshell, get your pump sets on Ebay and they last a LONG time.
One last note, the source for the pumps may also have the sets but I have no idea what he charges for them, but it was more than the typical Ebay price. He may allow you to buy a small quantity with your pump, or even entertain the idea of a larger amount as a group buy. Last I knew, he only had the 500 cc/ml sets, no biggie.... if your modifying them.
Regards
Noel