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from www.tmz.com – OJ Simpson’s ex-GF was stabbed repeatedly …. with a penis … and now she’s shopping the footage around to porn companies … TMZ has learned.

The woman at the center of the action is Christie Prody … who who dated OJ for 13 years before he went to prison.

Prody has contacted multiple porn companies, including Vivid Entertainment, in the hopes of selling a homemade sex tape … but before you get too fired up … no, her co-star is not The Juice.

We’re told the male featured in the video was Prody’s rebound guy following her split with OJ.

No word on if he used a glove.