Eyepiece adapter?

[nmasters]

hello all,
First of all I want to make sure that the little rubber piece thats on the viewfinder window is called an eyepiece. Is that correct?
My real question is: does an adapter exist so that one may use a canon eyepiece on a nikon?
The width of the nikon viewfinder seems to be just a few millimeters wider than my canon viewfinder.
The reason why I want to know is because I have this nice Minolta viewfinder 2x magnifier attachment; it fits on my old Canon Rebel G, but not on my Nikon D5100.
Thanks!

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[Big Mike]

I've never heard of such an adapter. I'd think they make all sorts of eye-pieces to fit your Nikon, if you just want a different one. But if you just want to use the one you have...You might try to modify it somehow.

[nmasters]

My last resort is try to sand down the sides of the eyepiece.
Although it would be quite difficult.

[KmH]

The Nikon viewfinder is a bit larger than the canon viewfinder, because the Nikon image sensor is also a bit larger than the Canon viewfinder.

I would be astounded if there is an adapter.

[nmasters]

Thanks for your help guys!