Thanks for your reply.

The dates are Oct 9-18. I too can find a number of companies which list the E350 as being "sold out" for a one way, but available for a round trip, Enterprise at DFW said they could do it, but it was sold out no matter what date I gave him for a one way. Enterprise also has a specific line for van rental in Dallas, who immediately told me it was impossible to rent an E350 one way.... In fact, let me know if you find the E350 on Avis or Budget for ANY random date one way as getting a price quote other than "sold out" from any date. I'd be pretty surprised.

Anyways, thanks for looking into it nonetheless I guess.