SB Cam Thrust Plate P5249637 no longer made? Only tensioner now?

Open a wanted thread if you need one. I wouldn't use a tensioner unless you are using a stock type chain and gears. Double rollers don't need one. The Tensioners are just stock Magnum engine parts. any parts store can help you there.
Why would you not use one with a double roller. They have some slack in them too, just curious.?