I've ordered from vision direct with good results. I like the colored contacts I got and didn't have any issues with ordering.
I got prescription contacts, but the base curve and diameter were different from my usual contacts. When I first tried them on, I could feel them a bit (not really uncomfortable, but while I never feel my usual contacts, I could tell I was wearing contacts when I put them in). But when I wore them at the convention, I didn't even notice them anymore. I wouldn't worry about the curve or diameter being slightly different, you might not even notice a difference - I bought ones with an 8.6 curve, but I usually wear 8.3, whereas you only have a .1 difference
Conventions 2009: Katsucon, Tekkoshocon, Costume Con, Anime Mid-Atlantic, Otakon, Dragon*Con, Anime USA