Anyone familiar with operating LGB on their brass track on an indoor layout is aware of the brass dust that accumulates from the contactor sliders. Also, the carbon brush wheel contactors deposit a black dust along the ties. Vacuuming the track on indoor layouts is both tedious and laborious! QUESTION: Does any manufacturer make a VACUUM track cleaning car that can be towed behind a loco? Hopefully, such a car would have a receptacle for the vacuumed dust that could be emptied later. And, NO, I do not wish to construct such a car, but rather would like to purchase one at a reasonable cost. THANKS in advance! :-)