I don't have that system, but have the same problem. My solution, that I found on You Tube, is to use short sections of PVC pipe to make adapters. The basic idea is to find a size of pipe slightly smaller than the outlet on the tool, heat one end of the PVC till it is formable, then force it over the outlet and let it cool. Then pipe fittings can be used, if necessary, to fit the adapter to the vacuum hose. If desired, a pipe that is slightly too large can be squeezed to size with a band clamp. I have made a number of these, and they work well.
My Metrovac uses 1 1/4" hose, which I find I can force fit into 1 1/4" PVC for an airtight fit. I can also force it over 1" PVC if the 1 1/4" is too big for the tool. I would rather use the 1 1/4" to not have a restriction in the air flow from the 1" pipe. Your hose may be a different size, so find what works for you.
The reason I use these is that I am cheap. These cost a lot less than the item from Rockler, and I can make them as needed. I also don't have parts laying around that I won't use (have enough of that already).
Tom