Would this recipe on stink bomb work?
Not all the matches have sulfur but only some types in The Preparatory Manual of Black Powder and Pyrotechnics
by Jared Ledgard see page 191, you can find the best matches for your needs, classic matches are okay.

You are right, no reaction is reported between sulfur and ammonia. However if you put in a closed box a compound containing sulfur and a little bit of organic matter Sulfur-reducing bacteria (SRB) reduce sulfur in sulfide anion.

$$\ce{S + 2e- -&gt; S^{2-}}$$
$S^{2-}$ is a base and reacts with water to produce hydrogen sulfide:
$$\ce{S^{2-} +2 H2O -&gt; H2S + 2OH-}$$

$H_{2}S$ is a conjugate acid of $S^{2-}$ so now can react with ammonia with an acid-base reaction:

$$\ce{H2S + NH3 &lt;=&gt; NH4SH}$$
or:
$$\ce{H2S + 2NH3 &lt;=&gt; (NH4)2S}$$

Of course like many ammonium salts it can easily decompose into the two odorous gasses.

Others odorous substances are  skatoles, mercaptans, indoles however I don't think that these are present in great quantities in this case. See this site for further informations.