The red/blue glasses should work ok for most comics. But be aware, that you may need to turn them around for a few. Making them left-eye blue, vs the normal left-eye red. The red/blue are actually the red/cyan.
I have three 3D issue of "Adolescent Radioactive Black Belt Hamsters". The old black/red printed ones. And the red/blue are used for them. And a couple other mags that I have.
If you are in the USA, and there is a Dollar Tree store near you, you may be able to get a couple pair of black frame, plastic lenses there. Not all stores keep them in stock. Although, if you can get the paper frame ones for free... why not.
. If you are near a (family) Party Supply Store, K-Mart (yes there are still some around), ToysRus, Joann Fabrics, KB Toys, or Hobby Lobby. You might be able to get a kids book/marker set that has glasses with polarized clear lenses, that work well. But are about $7 (US).
Man, I did not think to look for those type comics here. Silly me! Would they be allowed for uploading? As the copyrights were 1986-1987 & 2009.