Eddie....totally with you. Love the Reef Crystals buckets. But, if you can't find one, they not only sell the 5g buckets with lids at HD, you can also get a snap-on lid that retrofits to any 5g bucket and actually screws on just like the RC buckets to the point where I need a mallet to to get it open and closed.
I was in the same boat a while back and found the screw on lid in the paint section. It works awesome and keeps all the humidity out.
http://www.homedepot.com/p/Leaktite-5-gal-Screw-Top-Lid-5GAMMA6/203205720