Install this https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=251668912
It's part of a pack, but installing everything will also change some other textures, most annoying, Kleiner and Eli get different heads and HL2 doors are completely changed. This one, part 15, only changes the cryotubes to their proper texture as far as I know.
I know there's a Q&A thread, I'm simply placing this here so it's in plain sight for any new subscribers to see.
Also, a little request, whoever is in charge of pinning threads (I don't know if it's a forum mod or the creator himself), please do pin this, as I have just seen the thread doesn't appear in the main page.