Linhof Technikardan 23 - Roll Film Holder

I have just bought a used Linhof Technikardan 23, and I am looking for roll film holders for this one.
Is it only Linhof's own Rapid Rollex 23 and Super Rollex 23 that fits this camera, or is there any other brands I can use?

I've copied this thread from MF to LF, since the Technikardan is a bit of both and LF'ers might know. Personally I think a camera which can take standars 6.5x9 film is an LF camera, after all roll film holders can be used on 4x5" cameras too.

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