Crystals for DIY cake toppers?

Where can i order the crystals for the DIY monogram cake toppers?

TIA!

I am also doing my own cake topper. I have the wooden letter but i been shopping around for the stones. i went to M&J trimming in the city. They have the real stuff but a bit pricey and they offer free shipping http://www.mjtrim.com/Catalog/Category/447.aspx

I also found bead world which is like two blocks away but their stuff is not the authentic Swarovski crystal they say it is but you can tell its not! But they are cheaper.

Then there is http://www.gspn2.com/2012.htm

I know a few girls ordered from them but i am not sure of the quality.

Let me know where you end up ordering from. GL