I tried finding a thread to add to, but nothing really seemed right so.

Two of my characters have picked up Dwemer crossbow bolts in Dwemer ruins, Raven lvl 11 mage who has already said that he is not interested in joining the DG has picked up 50 in a Dwemer ruin associated with a College quest. Dahlia has picked up 20 in a dwemer ruin associated with a DB quest, she is lvl 21 and has said yes she will join but has yet to get to Ft Dawnguard.

I know that if you are a VL you can't craft bolts or even improve them, so I figured I'll get this out, sorry if it's old news but I couldn't find it.

BTW neither is a vampire, Dahlia will be. IDK if that matters.

They have been randomly added in dwemer ruins which is Good for vampires

They seem to be quite common in the bodies of Dwemer Spheres

Anyone can find them, but to craft them you need to be quite deep into the DG questline.

And in the Dawnguard Fort, if you're Dawnguard. Don't know about the fang-heads. They expired.

And that is basically why I posted the info, as a memeber of the Dawnguard you can craft them, but if your a vampire you have to find them.... well I'm sure pc players will be moding them in as a craftable item.