Wholesalecases.com is where I get my acrylic display cases and my star cases (thin plastic clamshell type). The acrylics, if you buy at least 5 at a time, are 8.95 each the last I checked. They are REALLY nice, but the shipping is a bit harsh. I guess I love my carded Joes enough to shell it out, lol.
As for the stands, the site does sell them, but I am not sure what size to recommend. If someone finds out, please let me know 'cause I need about 200 for my army of 25th figs!
Hope that gives you a starting point.