Here's a list of available NNNNN.com domains... more will come soon. Check my site for more extensive lists.
14282.com
14370.com
14395.com
14640.com
14677.com
14734.com
14798.com
14924.com
14964.com
14989.com
15304.com
15372.com
15402.com
15404.com
15495.com
17490.com