Hampden Auto Top and Metal Company, of Springfield, MA, made a rumble seat top in black or sport colors to harmonize with the top material. It retailed for $15.00 in 1928, $21.50 with curtains.
William Harris & Company in St. Paul, Minnesota made a "Tuxedo" rubble seat top. ("From 5th Avenue to Hollywood they're going over BIG!") List price was $15.00 in 1930.
The "Tuxaway" top was manufactured by the Brewer-Titchener Corp. of Cortland, NY, with a "special" retail price of $15.00 in 1930.
And don't forget windwings for rumble seat passengers... from the American Injector Company of Detroit.
All of these products appear at pp 207-211 of my 1971 imprint of Fahnestock's "Those Wonderful Unauthorized Accessories".