I am not certain why you might need pictures or drawings??? bottom boards and migratory covers are really just flat sheets of wood with some small cleats tacked on here and there. once you get the dimensions to your liking that is about the only decision you need to make.
Are you expanding quickly? Is that why you run out of them so fast?
Yeah, plywood cut to size is all I use for covers. Bottom boardas take a little more work, but like tecumseh says, they are just a board or boards w/ some strips of wood around the edges to elevate the hivebody up off the floor a little.
When they are conservative signs they will leave the hive and fly to the right and if they are liberal signs they will fly to the left. I try to use them according to where stuff is blooming, gets them heading in the right direction. :drinks:
with a political sign on the top and you being a Zoroaster ltlwilli they will likely fly directly to the stars looking for better beekeepers than are available here on earth. being ET (<no brag... just fact) I can tell you there are places where they can do better.
folks have used all kinds of stuff for tops.. I have even read of folks using old carpet or anything that might turn the weather.