We are doing them ourselves to TRY to save money. Do u know of any websites?

buy flowers wholesale and make the centerpieces yourself

My friend who just got married this summer had amazing centerpeices that we made. She got large vases and we filled them with stones (the same color as her theme). Half of the centerpeices had floating candles and the other half had beta fish (all the same color as her theme). The tables that had beta fish also had a ring of candles around the centerpeices. All of the supplies were bought at Michael's in bulk and they turned out to be very cheap centerpeices.

You can make some terrific decorations yourself, no matter your colors, theme or budget! Here are some helpful websites I recommend:

http://www.reasontoparty.com/weddings.com
http://www.do-it-yourself-weddings.com/wedding-centerpiece-ideas.html
http://www.wedcraft.com/

If you have specific ideas (colors, themes, etc) and would like more resources, let me know.

Congratulations and Best of luck!