Is there any reference where I can find the character table of $\mathrm{SL}_2(\mathbb{Z}/p^n\mathbb{Z})$? A simple search in google gave me this paper of Philip C. Kutzko on "The characters of the binary modular congruence group". But this is just an announcement and I couldn't find the complete paper. I also know that Kloosterman has a paper which discuss representation theory of $\mathrm{SL}_2(\mathbb{Z}/p^n\mathbb{Z})$ but as far as I see he hasn't computed the characters. I am looking for a reference where I can find the actual character table.

I would be thankful if you please let me any reference about this.