By this point, I'm sure you do not require this, but just in case there was anything else from past builds for Killing Floor 2 you were after (Even the first 9mm sound revision for a chuckle), I've got an archive for the Wwise files (WEM, BNK, TXT when they had them) for builds as far back as Build 1005 & even Build 1008 when Classic Masterson & Briar were first introduced (Of which I believe had some initial dialogue before being updated in Build 1013, at least for Masterson as Briar only had one or two initial pain sounds swapped).

Should you indeed be looking for anything, help yourself to what I have here (I only recently discovered I had a wrong download link for Build 1005, which has been restored):
https://gtm.steamproxy.vip/groups/bizarchivistsoundproject/discussions/2/2561864094344366361/

Otherwise, keep up the great work!