I think this will work. Loc-Line 80813 Shop Vacuum Kit, 2.5", Blue/Orange
I use a shop vacuum because I have a CleanStream filter that filters 0.3 microns, and my dust collector is 10 microns. Testing in my shop with my tools, I find that this works better than the dust collector, which catches the big stuff (chips), but the fine stuff goes right through the ten-micron bag. I don't have any tools with a 4-inch connector.