Hobbie> There are some nice kits available, though expensive at the moment since they haven't been released for awhile and are out of production. Many of them are due to be re-released soon in time for the anniversary of the Apollo 11 moon landing, so you're in luck there.
You might look through the "Race Into Space Group Build" to see if there is anything someone has posted that would strike your fancy. Some nice subjects listed.
http://cs.finescale.com/fsm/modeling_subjects/f/29/t/179883.aspx?page=1
You might try the modeling sites like Megahobby or Sprue Brothers to see what's available. Ebay may be your best bet, however until the new releases come out.
Gary