Change mounts on Vivitar Series 1 lenses?

I'm considering trying to put Nikon mounting flanges on a couple of Vivitar Series 1 lenses with Olympus OM mounts, a 90mm f/2.5 macro and a 28mm f/1.9 lens, for use on a Nikon D5000.

It seems that one could buy some kind of cheap old Series 1 for Nikon lens or tele-converter, etc, remove its mount, and swap it for the OM-mount on the desired OM lens.  This would assume that, for example, Series 1 90mm macro lenses for all cameras are identical except for their removable mounting flanges. It would be nice if I could get some kind of verification for that before I blow $50 or $60 or more on an old lens just to pirate it's mount.  Or maybe I could locate broken lenses for sale for parts.

Admittedly this is mostly just nostalgia for my glassy old friends from the 70's and 80s, since I already have the equivalent DX lenses for Nikon, the 85mm Micro Nikkor and the 18-55mm and 55-200 kit lenses.  Of course the Vivitar lenses are faster but lack vibration control.  Alternatively I could get an old OM digital camera to use with the lenses as they are, but that would be even more wasteful redundancy

Any ideas would be appreciated.

Thanks,

Doug