Thanks for the ideas everyone!
I will first have to eliminate the dryer sheet and Fabreeze option. Those are both just as bad as the original stench. I didn't mention in the OP, but I have a potentially fatal "allergy" to many synthetic fragrances. The fragrance used in dryer sheets will kill me in short order. I have been sent to the hospital from walking by a laundromat! Its not a fun thing. Makes me an odd person, but actually there are millions of people with this affliction worldwide.
I have pulled scents to a moderate degree with alcohol before, but never enough. These synthetic fragrances are engineered to be persistent *and* volatile. To me, that's pure evil. Vinegar has been the same -- helps, but never enough. I have had to throw away good items made of plastic that were "contaminated" and will never be de-scented ever. My fear is the camera plastic has absorbed enough scent to deem this camera un-keepable. This is really unfortunate to the extreme. I looked long for this camera and paid plenty.
Now, pumice bags? This is a brand new thing to me. I am absolutely going to seek these out. I'll try nearly anything.
Right now, the camera is out in the back yard, in the breeze, in the sun. That is the only thing that's worked for a few things in the past.
Also, since this scent doesn't appear to be one that contains the chemical that I am sensitive to, I won't die from using the camera, but it will be so unpleasant I won't use the camera. It's that stenchy. I think the guy applied cologne directly to the camera. He must have. Why?