Does anybody know where I can buy a plastic carrying rack that holds (4) 3700 series boxes. I bought some at Wal-Mart a couple of years ago and now I cannot find them anywhere. The ones I have are "Bait Box" brand and are black plastic frames with a convenient carrying handle that hold 4 clear 3700 series boxes. They have mounting holes so you can mount the frame on a horizontal or vertical surface and a latch that you can secure the boxes in the rack with when traveling. If anybody knows who sells these, please let me know. Thanks