This is a list of the textures I browsed before finding the one used in Ada's Separate Ways and I totally understand your frustration since Capcom made a different set for every Language:
01000001 Ashley
01000005 Ashley Diva
0100000b Ada Merc
0100000c Ada Spy
01000011 Ashley
01000015 Ashley Diva
01000016 Ada Separate Ways
0d20b000 Ada Castle Labyrinth Cutscene (all 0dxxxxxx are cutscenes textures packs)
Jacket Leon is before Ada's Merc texture Pack and Mafia's Leon is after or near Ada's Separate Ways
And this is the old list, I guess PL=010000 now:
PL00 = Leon w/ Jacket
PL01 = Ashley Graham NPC [Normal]
PL02 = Ada [Separate Ways]
PL04 = Luis Sera
PL05 = Ashley Graham NPC [Diva]
PL06 = Hunk
PL07 = Policia A + B
PL08 = Leon without Jacket
PL09 = Leon [Tactical Vest]
PL0A = Jack Krauser
PL0B = Ada Wong [RE2 - The Mercenaries]
PL0C = Ada Wong [Assignment Ada]
PL0D = Albert Wesker
PL0E = Jet Ski
PL0F = Boat + Spear
PL10 = Leon [RE2 R.P.D.]
PL11 = Ashley Graham [Normal]
PL15 = Ashley Graham [Diva]
PL16 = Ada [Separate Ways]
PL17 = Ashley Graham NPC [Knights Armour]
PL18 = Ashley Graham [Knights Armour]
PL19 = Leon [Gangster Outfit]
So Leon Gangster Outfit should be 01000019 ...