I have an '80s 3HP Rockwell router that I use upside down in one of those cast iron wings off my shaper. Although I have dust collection from the fence above the table, a ton of dust seems to make its way into the windings of the router itself, which are visible when looking down at the motor from above. I know that many router tables enclose the entire router and offer dust ports. Many of my handheld routers have proprietary dust ports that attach just above the collet and seal at the base, and do a good job of collecting dust at the source. Does anyone know of a universal port like this, that I could fasten to an older router via an original or shop made plate? Thanks.