If you want a 505 emptor and tray and not just one that will fit, there are differences between 505 and later models. Pictured is a 505 emptor and 505 emptor tray on the left in each picture.
Note the round shape to the 505 emptor tray lock and the teardrop shape to later models. The tray on the right is a new black emptor tray, the one on the left is an original 505 emptor tray. I hope this helps in your search.