I don't have a quick answer, but in case you haven't seen, there is a u shape on the lower part of the handle that slides into the side of the swiss ranger to hold up a pot inside the tube. Any small diameter pot should do the trick.

Wikipedia says: Although the use of aluminium cookware has not been shown to lead to aluminium toxicity in general, excessive consumption of antacids containing aluminium compounds and excessive use of aluminium-containing antiperspirants provide more significant exposure levels.

Short term I wouldn't worry too much about the aluminum. it is a nice fairly light set. I picked one up and plan to play with it this summer.