There is this old thread about her in the Who's that girl? forum. I wasn't sure if I had to reply there or post a start a new thread here. Don't hesitate to merge the two if needed.
Her profiles:
Olga M profile @ dildoandfisting.com (norestnetwork.com)
http://www.dildoandfisting.com/index.php?page=viewprofile.php&id=244
Olga Z. profile @ 21sextury.com
http://21sextury.com/model/
Her movies:
Gangland 72 as Olga. Pictures stolen from this thread
Omar's Butt Obsession (scene 1) as Olga with Betty. The first half of the scene only features Betty but Olga join in for the second half.
Her scenes:
LetsPlayLez.com as Olga Z. with Bettie (2011-04-20)
http://21sextury.com/scene/93012/Wild_plays_with_Bettie_and_Olga/
DildoAndFisting.com as Olga M with Monica (2010-07-12)
http://www.dildoandfisting.com/index.php?page=viewfilm.php&scena=343
Mol