The About US page says the bus owners are Mike & Heather Jansen and Greg & Julie Hansen. I'd try the
http://www.landscapesunlimited.com page since that's the root; someone listed on the contacts page there ought to know how to contact the Jansen/Hansens. The contact page (on landscapesunlimited site) also lists the address and phone numbers for Landscapes Unlimited.
Good luck!