You have two threads going.  If we could consolidate that would be great.

I'm glad to make something for you and export in obj.  I use Softimage XSI 2009 (7.5).

I can make something in Hexagon or possibly Carrara 1 (yes, I failed to update), or blender or a bunch of other free apps, but Softimage is my preferred choice.

What would you like?  A modified torus that looks like an engagement ring?  Something really complex like an airplane or a car might involve more points / vertices than you want to manipulate right now.