harbor freights has a universal trim removal tool. I haven't used it, but have thought about trying it out to see if it works. It's only $6 or $7 dollars, so you wouldn' loose much if it wasn't any good. Maybe someone else here has a good idea for a home made jobber that will work!
I used a large screwdriver and a rag. Start at the lower corners and slowly pry them up, using the rag to prevent marring the surface. Once you have the bottom pulled up they should lift out by hand. I have pulled two sets this way and had no trouble. If you mean the nut locks that hold the drums on, yes, most parts stores should have them.