FG Dresses

Ok...so i have 11 girls... tand hat's with 5 kids... 2 which are flowergirls. Since I can't change the junior BMs dresses prices...I don't want the FG dresses being just as pricey as them. Anyone have any ideas of where I can just get a plain white but cute and pretty with a little puff to it, FG dress? I will add the material at the bottom to match the rest of the bridal party with my FSIL. They will be 3 and 4 in April...I think 60 will be a good enough deal... any suggestions?? I can't see having them pay 150 for EACH FG dress...that's just crrrazy!! Please help! THANKS!