ISO 2022 itself is available for free download under its alias of ECMA-35, but the register of character sets seems harder to find.
all-escapes (http://bjh21.me.uk/all-escapes/all-escapes.txt) lists at least some of them, and it cites its sources, of which the relevant one is <http://www.itscj.ipsj.or.jp/ISO-IR/ (http://www.itscj.ipsj.or.jp/ISO-IR/)>.
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all-escapes (http://bjh21.me.uk/all-escapes/all-escapes.txt)lists at least some of them, and it cites its sources, of which the relevant one is <http://www.itscj.ipsj.or.jp/ISO-IR/ (http://www.itscj.ipsj.or.jp/ISO-IR/)>.