Substitute for Item 81-078, but with concave roller instead of flat roller

A quick learner from Manassas, VA says:
The body of item 81-978 is exactly what I need for a replacement I'm looking for, except that it has a flat roller. I need the same assembly with exactly the same dimensions and design, except that I need a concave roller. Any suggestions from your end?
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Paul from SWISCO responded:

Hello,

For the similar roller housing to our 81-078, rake a look at our 81-086 with a concave wheel. Thank you!

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