I have been looking for large rectangular planters for some time now. Roughly 36 - 48" wide, 28 - 32 high and approx 10" deep. I'd love to know ideas for modern-looking options that are easily moveable (casters preferable). The planter I've found recently has the right dimensions but it doesn't have an interior tray and I'd love to know of any ideas on how to fashion an interior tray in a tall planter as well. Thanks for any help!!!