Im just writing a bit of fluff. I dont suppose anyone can remember if Terminatorsa were mentioned at all, and if so what were they called? Did they have a collective squad name? Or were they dispersed throughout the Temples?

If you refer to the Thousand Sons Terminators I think they were referred to as the Sehkmet.
I believe they were all veteran sorcerers who had reached a certain level of power, from all the cults.

The companies (or Fellowships) in the Thousand Sons were all made of a mxiture of the cults.

That's it! The sekhmet. I thought they were mentioned but couldn't remember their name for the life of me.

Wasnt it also mentioned there is only 80 or so of them?

It also didn't specify if only the Sehkmet used Terminator Armour or there were other suits available for other marines.

I would like to think the suits are distributed between the fellowships. Much like the Psychic skills.

Of course the Sekhmet are exclusively all Terminator armed.
Maybe even extend that to anyone ranked Philosophus?