Henle is usually supposed to indicate the original fingerings in Italics
It is a bit confusing because they did an exception with this work. At the preface, they state that they usually put the composer's fingering in italics... but they did the opposite with the Chopin etudes. So, in Henle's edition of Chopin etudes, Chopin's fingering is written in normal numbers and the modern ones in italics (the same Paderewski and PWM do).
Does anybody know where to find the original ones? or is it just a mish mash of what people claim to be original?
Henle has many of the original fingerings but you may take a look to the National Polish Edition PWM edited by Jan Ekier which includes the original editions printed fingerings plus some else annotated by Chopin himself on work copies for his pupils. The Wiener Urtext edition edited by Paul Badura Skoda also has a few of this additional fingerings. Hope it helps.