Mine grow in a 50/50 mix of peat moss (not MiracleGrow brand!) and pool filter sand.

Your mileage may vary.

I said I could find peat moss. ^ looking for alternatives

Have you looked anywhere besides Home Depot? I believe people do use coconut husk fibers with various success. Check out Savage Garden on reddit.

Try some local small garden centers. I use 50/50 peat moss and perlite. Hoffman's peat or Esphoma. NEVER use Miracle grow stuff.