Duck:

In case you didn't guess I am a lefty. I started tying flies when I was about 10 yrs old. My father, a righty, didn't think to flip the vise around to suit me being backwards. So I learned to tie with the vise positioned as if I was right handed. In fact I never thought any thing about it until I had to teach some scouts how to tie flies. It seems I was switching things around and around and confusing them. But they somehow learned.

I imagine that if vise manafactures thought they could make a few bucks they would make a product like you suggest.

Tim