A Japanese blog is publishing pictures of what it claims are accurate mockups of the iPad 2.   Roughly translated:

Our monthly meeting of the parts procurement and manufacturing of original products repair, go to Shenzhen in the case or buying accessories. This city has a variety of products and components are distributed in the city say the head temple of PCs and mobile phones.In some cases manufacturing plant next to the city in December 2010 iPad (iPad 2) model (a simple reproduction of original size) seen.In some cases the factory since then have seen a product called iPad2 case.

Closeups reveal that the models are much thinner than current iPads.

Much more below:

With speaker grill below:

The front (above).

We’ll find out how accurate these mockups are on March 2.