Looking for a weathertite storage box fbike rack

[RMccord]

I have the new versions with the rear bike/storage platform.
It can accomodate a container 66"WX19.5"D. I looked at the toolboxes for pickups but although they might be awefully good I think they may be too heavy.
Any ideas and or sources would be appreciated.

[RADHAZJOE]

I got a under the lip bed box, light weight diamond tread, which can hold over my head with one hand and I am over 60. Got it at pepboys. It is about 4 inches shorter than my truck bed is wide.
Yes, I think the high end units of heavy guage aluminum would be too heavy.
Mine came with a lock.

[DrivesBGM]

I got a "plastic" box from Walmart. It was very reasonable and is quite sturdy! That's waht I'm using in the bed of the truck.