Just found the latest Fredericus Rex set - he's added more to his fascist set so that he has a complete set.
The following are OK - do not need to make new versions :
AFG, ALB, ALD, ANH, ANN, ARM, AST, ATJ, AUS, AUSDUAL, AUSHUN, AWA, BAL, BAY, BEL, BER, BHU, BOL, BOS, BRA, BRE, BRU, BUK, BUR, CAM, CAT, CHE, CHL, COB, CRI, CRO, CSA, CUB, CYP, DES, ECU, EST, FLA, FRA, FRM, HAM, HAW, HEJ, HEK, HYD, ION, IRE, ITA, JAV, KOK, KRA, LIP, LIT, LIV, LUA, LUB, LUC, LUX, MAN, MEC, MEI, MEX, MOD, MTC, MYS, NAG, NEN, NEP, NIP, OLD, ORA, PAN, PAR, PEU, POL (I think), POR, PRG, ROM, RUS, SAR, SAX, SCH, SCO, SER, SGF (I think), SIA, SIK, SIN, SLO (I think), SPA, SWI, TIB, TRA, TRI, TRN, TUR, TUS, U22, U23, U24, U26, U27, U28, U29, U30, U31, U33, UKR, URU, WEI, WLL, ZAN, ZUL
The following contain banned elements, definitely need new : ARG, CAN, DAN, ENG, FIN, GER, HOL, HUN, NAL, NGF, NOR, NWZ, PER, PNM, PRU, QUE, SAF, SWE, USA
The following are renamed base or other historical flags, so if we can get new versions, we should : ABU, ADE, BAD, BAS, BOH, BRZ, BUL, CAL, CHI, CLM, COL, COS, CRE, DOM, DZG, EGY, ELS, ETH, GEO, GRE, GUA, GWA, HAI, HAN, HED, HLS, HON, HOW, JAI, KAL, KHI, KOR, KUT, LIB, LOM, MAK, MAL, MOL, MON, MOR, MUG, NAS, NEJ, NEW, NIC, OMA, ORI, PAP, SCA, SIC, SLV, SOK, TEX, TUN, U20 (Czechoslovakia), U21 (Yugoslavia), U25 (Iraq), UCA, VEN, VNZ, WAL, WUR, U32
BIK (Borno in SW Chad/NE Nigeria)
BUN (Nyamweze in Central Tanzania)
JAS (Malinke in interior of Guinea)
KUT (Masina in Eastern Mali)
LAD (Xhosa in South Africa)
MAK (Asante in Ghana)
MEW (Sotho in South Africa)
ORI (Herero in Namibia)
SEM (Buganda in Uganda)
U05 (Lozi in West Zambia)
U06 (Yeke in SE DR Congo)
U07 (Bambara in Central Mali)
U08 (Ha'il in NW Saudi Arabia)
U15 (Aotearoa - Native New Zealand)
U16 (Nez Perce Natives in NW USA)
U17 (Sioux Natives in the Central USA)
U18 (Apache Natives in SW USA)
