How 'bout that?...

It looks like we may have gotten lucky already. I got a response to an email I sent to the Active Door & Window Co.:

hey! i got your message about the tree house and i think we could help....we definatly have some items here we could get to you at cheap
price....let me know exactly what you are looking for or just stop by at our holtsville location. i know for sure we have a cutdown 9ft door unit that may work well....its been here for a year or so and we are looking to get rid of it. we also have a lot of vinyl windows of assorted sizes.

just let me know what would work best for you.

thanks,
bob jr.

Yes!