Sure!
I always providing to my Contest Holders variations of the winning logo, which they need (on white and black background, standalone logo and if there is need for additional color variation, there will be no problem for me to send you) and all those variations will be saved in multiply formats .eps, .pdf, .jpg and .png (with transparent background)
Here are updated #131 #132 #133
If you have any questions more, feel free to ask.
Aleksandra :)