Mmmm that is a hard length to find as it all seems above the knee or floor length, maybe you should get them to look at styles not particular dresses overall they like and are happy with then take it to a dress maker and have them made?!
My BM's were fussy in the beginning, they didn't want anything that made them look old so they ruled out floor length in favour of prom style, we looked and looked and they couldn't decide on a style that suited them both so we plumped for a Hobbs bright pink chiffon knee length dress with satin waist strap and matching pashmina
In the end our wedding plans changed from April to February and that meant having to buy new dresses for the girls, with a month to go and both living at seperate ends of the country it was difficult as i relied on emailing them pics and time was fast running out... we ended up going with traditional floor length BM dresses but in a non traditional colour and they both loved them!!
[Modified by: HodgeysWife on March 08, 2010 06:42 PM]