https://mtccindia.res.in/

You can procure from this culture collection.

Hi thank you for your help. Can they ship the culture outside of India? I am in Malaysia.

I have warned several times that a microbial name or medium or technique should be written in full while asking questions. C. violaceum is presumed by me to be Chromobacterium violaceum. I don't see what is difficult in writing that. However, you could get the strain from NCTC or use the document attached. You can also follow this researchgate link from 8 years ago and pay special attention to what Aurora said. https://www.researchgate.net/post/Does_anyone_have_Chromobacterium_violaceum_CV026_and_VIR07