current HXD codes

91 05 10 00 39 Dweard
16 8A 2E 00 39 Twitch
15 8A 2E 00 39 Bahroo
11 8A 2E 00 39 Cartoonz Shirt
1B 8A 2E 00 39 Panda TV
1C 8A 2E 00 39 Panda TV Gold

93 05 10 00 39 Street Meg Jacket
94 05 10 00 39 Street Meg Pants
17 8A 2E 00 39 Twitch
12 8A 2E 00 39 Bryce Jacket
13 8A 2E 00 39 Angry Pug

95 05 10 00 39 Science Fair Jacket
96 05 10 00 39 Science Fair Pants
19 8A 2E 00 39 Sxyhxy
18 8A 2E 00 39 72Hrs
99 05 10 00 39 Brazil

97 05 10 00 39 Daddy Jake
92 05 10 00 39 Sharp Mustache
D4 47 1F 00 39 Unreleased blue Jake shirt
http ://i.imgur .com/V0KZ4 87. png

1A 8A 2E 00 39 Diatech

21 B1 2E 00 39 Red Ace hat
63 90 0F 00 39 Blue Ace hat

E1 14 2E 00 39 Delirious Trapper
E2 14 2E 00 39 Ohmwrecker Wraith
E3 14 2E 00 39 Smiley Nurse
83 84 1E 00 13 Unreleased Doctor Stuff (Search and replace the pattern 3 times)
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Special cases

They all share the pattern of 01 00 00 00 3B so you shouldn't try searching for the pattern because you will get too many results.
Instead search for this:

UI/Icons/Customization/MT_Torso02_04 Street Meg Alt jacket
UI/Icons/Customization/MT_Legs04_04 Street Meg Alt pants
UI/Icons/Customization/CM_Torso02_04 Science Fair Alt jacket
UI/Icons/Customization/CM_Legs02_04 Science Fair Alt pants
UI/Icons/Customization/JP_Torso03_04 Daddy Jake Alt
Game/Characters/Slashers/Mask/TRMask06_REF.TRMask06_REF Unreleased Trapper mask

Now scroll a bit down, look for 01 00 00 00 3B and change it to FF FF FF FF 3B.
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Thanks to sankleros provided Data folder I found out how to unlock these unreleased cosmetics:

htt p://i. imgur.com / OWtzmqU . png (Vector Victory, Pale Slouchers, High School Troublemaker, White Stitch Jeans)

You need to search for the pattern 34 39 39 30 38 30 and replace it with 35 30 39 30 36 30.
Do this 4 times.

For the Bloodletting shirt you need to search for the pattern 36 33 39 37 31 and replace it with 35 30 39 30 36 30.

Cosmetics from the same pack share the same pattern.
Search for the pattern I provided and replace it with 35 30 39 30 36 30.

The 80's Suitcase

35 33 30 37 31 30 (20x times)

Bloodstained Sack

35 35 34 33 38 30 (8x times)

Headcase

35 37 37 39 30 31 (12x times)

Bloodletting

36 33 39 37 31

Charity Case

36 32 37 35 31 30

If you only want a specific piece you will have to search for it's location.
Basically just do step 4 to 8 from the first post, look down and replace the pattern.