If you haven't already, you might wanna check the "Celeb and Movie Discussions" board over at CNDB (http://www.cndb.com/phpBB2/index.php
), where the topic has been discussed at much length. Some of the posters do tend to interpret any rear-entry scene as anal, so use with all due caution!
The cable sexy thriller The Beneficiary
, from abt 1998, with the ever-hot Stacy Haiduk as a wife interested in becoming a wealthy widow, uses a not too extendedly-simu anal scene as a plot point. It's an SC in the style of the late 80s/early 90, where a murder plot is at the center of the story and the sex scenes don't dominate.
The 1976 Young Lady Chatterley
features a decent anal simu scene in one of the flashbacks to the gamekeeper and the original Lady C. She requests it and gets it during one of their interludes.