good luck looking for a pre-fab floor tray of that size (60x30)
I was looking into something like that 3 years ago when i was doing my basement washroom and turned out that I went with a plain low cut bath tub. Back then, if i wanna go with a nice floor tray with drain at the end of the tub, I found a company that can custom make one but the price is crazy. Or you can go DIY with plastic liners and custom tiles on top. It is a very complicated job if you wanna DIY.
Forget about asking questions at burnaby homedepot, they suck !