On a Norwegian brewers forum, they've found that ebay seller "gadgetinfinite" sells the correct version, time and again. I've recently bought from that seller. Got the correct version.
http://stores.ebay.com/gadgetinfinite?_trksid=p2047675.l2563
Funny how there are countless alloys of stainless steel, where some alloys are less prone to rust than others.
Also, a pump is by definition not one and the same as the motor driving the pump (the magnetic part). For a perfectly food grade pump, the pump housing would be sealed from the motor...