Another option is to contact local architects or home builders. They may have their own portfolio of 3000 - square - foot two - story house plans that they can show you. Sometimes they can also customize an existing plan to better fit your needs.
There are also some specialized house plan marketplaces. For example, Dream Home Source offers a large collection of house plans. When looking for a 3000 - square - foot two - story plan, you can filter by size and number of stories. You might need to pay a fee to access the full details of the plan, but it's a good resource for finding something that suits your taste and requirements.