Yes, there is lot out there on dust collection. The dust port I was referring to looks like this
www.rockler.com/product.cfm?page=16972&site=ROCKLER
It probably won't fit on your saw as is, which is why you may need to fit a plywood or hardboard plate to the bottom of your saw, then install this on that plate.
It sounds like you are well on your way to solving your dust problem.
The only other thing I could ad, is you might also want to construct a standalone air cleaner for your workshop. Again there are a variety of free plans around for these that all use furnace filters to clean the air in the workshop. If you have a forced air furnace, I would probably turn off the air blowing through the shop too, that will help stop the spread of dust too.
Let us know how you make out
Colin