After much digging, I narrowed the field to;
* Shun Classic 4": http://www.chefknivestogo.com/shun-paring-knife.html
* Miyabi Kaizen: http://www.chefknivestogo.com/mika4pakn.html
* Miyabi 7000D: http://www.cutleryandmore.com/miyabi-70 ... fe-p111284
* Tojiro Flash: http://www.cutleryandmore.com/tojiro-fl ... e-p113660#
By chance though, while doing a more generalized search for shun 4", I stumbled on and finally got this:http://www.williams-sonoma.com/products ... 84-7566045
I was worried that being only 4", it would be a stubby santoku like the OXO Mini Santoku:http://www.amazon.com/OXO-Grips-Profess ... B000A13ODE
But calling into their sales line, the rep physically got one to inspect and she said it's more like the picture when you click on the 4" selection box (more elongated, like a proper santoku), so I bought it.
Well, it's obviously not a paring/petty, but I couldn't pass on the notion of a Shun Damascus hollow-ground Santoku, in a paring/petty size.