Free: Contests & Raffles.
Ebay has some on there that seem pretty fair priced
Here is where I bought My beetles. I found that I got a larger quantity for less money from this place. Even though it's in alaska, he ships then quickly and they arrive in good shape. http://www.bonesandbugs.com/
The bonesand bugs site has all the info you need to care for them. Substrate: Add an inch of shredded paper or commercial mammal bedding (available at pet stores) to the floor of the container. (Do not use any cedar based product, such as wood shavings, as cedar is a natural insecticide!) Many folks use cotton wadding from an old mattress, as this makes an ideal substrate for the beetles to live in. Don’t be concerned if this seems like Spartan conditions; the beetles don’t need a great deal to be happy. Add numerous fist sized chunks of styrofoam, as this is the material the larvae will burrow into to grow and pupate into beetles. Keep adding styrofoam as the beetles reduce it to shreds! The beetles will create "frass", a powdery combination of their waste product and chewed up styrofoam. When the frass becomes deeper than several inches, or begins to become damp or cake, scoop half out, place in a shallow pan and place some meat on one side of the pan to lure out the beetles and larvae. Replace the beetles and pitch the excess frass.I posted this because I found the commercial mammal bedding to be the easiest to deal with. Shredded paper will work but it likes to stick to the skulls and bones more than the substrate. I have a 30 gallon tank I was using if you want it Josh... let me know.
They STINK!
How many are you looking for I be able to help
The beetles themselves don't smell. It will be the rotting meat/flesh, brains, etc, that smell. If ya got a weak stomach you might not like that process. Even Maceration will smell.