Covering the Bases

[webmd]

I am looking for a bus from Boston to New York that leaves after 1 am and gets in to NY around 6 on June 12. I've checked Greyhound, Shortline, Megabus, and Fung Wah and none have a schedule that exactly meets my needs. Are there any stones I have left unturned (bus service-wise)?

Edit: Found what I was looking for with the Lucky Star Chinatown bus. Thanks for all the tips though, good to know about all the services out there!