Out of the available research papers, nothing according to my knowledge claims to have cultivated the growth media for M. leprae or even if they did, the bacterial suspensions do't seem viable.
I am the author of the Conference Paper IN VITRO CULTIVATION of Mycobacterium leprae with INTERLEUKIN-2
My answer to your question is Yes, I could cultivate M. leprae. And, I will look for the conference presentation slides and will send you a copy to you.