Back in the 80's I tried some different joystiks, many of them also had 2 buttons,
but they were both connected to the same button both left and right.
So I had to modify some various joysticks for my self.
The best of them all was: Competition Pro 5000 from the former Euromax in UK.
Tested in ZAPP! 64 October 1985.
I too would like to see Roller Controller support, but the alternative is actually much better, if we can make it work: We can (and probably will) devise a small dongle-type adaptor that allows the player to use the Atari paddle controllers (or the paddle on the Coleco Gemini controller, same thing AFAIK) with Arkanoid on the ColecoVision.
Ok Pixelboy, and Ataripaddles may well still be bought, perhaps via ebay ?.
I'm waiting to buy Paddles until you an Opcode have decided which controllers it should be.
And if we do not buy paddles, the game is still played with the regular standard controllers.