Here is a mat with one scalloped edge that I made for a LO. Are you tired of the scallops yet? 
This one would also work nicely for a card if you extended the width for folding.
This svg file can be used in either version of SCAL. This file is for personal use only. Feel free to link to this post, but the file is not to be shared or distributed in any way.
Download the file from here.
Thanks for this file, appreciate your talents and sharing with other crafters.
Merry Christmas.
Thank you so much for this post. I want to let you know that I posted a link to your blog in Creative Busy Hands Cricut Freebies Search List, under the Card post on Oct. 11, 2010. Thanks again.
I love this file. Thank you so much for sharing
so pretty, thank you!