A long time back somebody here on ar15.com showed a picture of a magazine that looked like the type that JA Ciener uses in his 30 round mags for the AR-15 and the Mini-14. It looked similar to the one shown in the picture below.
This picture actually shows a 30 round magazine for a PPS-50 and cost around $99 -- I'm showing this because it is similar to the type I'm looking for. I won't cut up a Ciener 30 round mag because the cost around $50 to $60. The person that showed the mag that was similar to the one in the picture mentioned they cost around $10 or $15. I would guess the magazine is made in Europe and is used by just about everybody that sells 30 round 22lr mags -- they just add their little piece of sheet metal adapter to make it fit in their gun -- like Ciener does.
Does anybody remember where these mags can be found?