Here are a few places that have Bakelite mags in stock online that are not as outrageously priced. Let me know if anyone has seen cheaper.
5.45x39 Izhmash Bakelite Mags:
https://www.legionusa.com/russian-ak-74-5.45x39-30rd-bakelite.html
5.45x39 Molot RPK 45 Round Bakelite Mags:
https://coppercustom.com/accessorie...-round-magazine-5-45x39-bakelite-rpk-magazine
5.45x39 Izhmash Bakelite Mags:
https://www.legionusa.com/russian-ak-74-5.45x39-30rd-bakelite.html
5.45x39 Molot RPK 45 Round Bakelite Mags:
https://coppercustom.com/accessorie...-round-magazine-5-45x39-bakelite-rpk-magazine