You have several options. Do you have an AK side rail? You can mount a rail with that. You could use the Texas Weapon System or go even simpler and replace the upper handguard with a small rail for a red dot.
You should have a rail on the side of your WASR. If so, I highly recommend using it, and going with one of these:
Kalinka BP-02 AK/AKM Low Profile Centered Side Mount to Weaver Rail w/ Black Finish