Which Cameras will accept IQ-260 Achromatic backs?

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I am trying to find a medium-format camera with a waist-level viewfinder which will accept the IQ-260 Achromatic back to use for B&W infra-red photography. Any suggestions? Can this back be adapted to older SLRs like Mamiya RB/RZ-67, Mamiya 645-1000s, Hasselblad 501C, etc? I am an old man with difficulty getting down (and back up!) for low-angle shots. With an eye-level finder I can only get eye-level shots. If this is all I can get, I might as well just get a Canon DSLR converted by Lifepixels, allowing me to use some of my current equipment. Thanks for your help.

[Ulf]

Hi
Is this a specific mount on the IQ260 you are referring to?

If it has a Phase One / Mamiya mount then it can be used on a XF with a waist level finder
https://www.phaseone.com/en/Photography/XF-Camera-System/Accessories

If it has a Hasselblad V mount then you can use is on any Hasselblad 500 series camera.
If it has a Hasselblad H mount then it can be used on Hasselblad H1, H2, H4x, H5x and H6x
Lastly, if it has a Contax mount then it can be used on Contax 645AF