You don't need harmala fumarates for pharmahuasca, really.  The yellow crystals you get from NaCl salting (the Manske procedure) are hydrochloride salts and these are as good as fumarates. 

In fact you can use both harmala freebase and dmt freebase for pharmahuasca preparations: simply dissolve the freebases in just enough dilute food grade acid, such as vinegar or citric acid.