How do you get the snap ring out of reluctor?

Replacing distributor coil on electronic distr, looks like it should b easy, but I need to get the snap ring out from under the felt in the distr drive hollow to get the reluctor off. Tried several tools and can't get it off. Advise ? Also if it ends up I decide to get a new distributor, can you recommend a good brand? NAPA? Thanks in advance,