Well..it's a bit toxic, yeah, but if you have elementar sulfur you can make it just by mixing the sulfur with carbon and heating it.

C + 2S ----Heat------> CS2

Anyway, I'd also think that  butane is not convenient, because you have to work under pressure and because of the fire hazard! Toluene is a good solution.

http://www.chemicalforums.com/index.php?topic=5831.0

But be careful

I have CS2 and my earlier sulfur samples used to dissolve in it. Now the new one does not dissolve. Any idea why it is not dissolving?

It would be covenient to Identify the allotrope of sulfur (*); cf.: https://en.wikipedia.org/wiki/Allotropes_of_sulfur https://www.researchgate.net/post/Does_anyone_know_the_solubility_limit_both_are_nonpolar_molecules_and_seems_to_be_soluble_of_sulfur_S8_in_n-pentane