I've just returned to the forum and see to be a little late for an answer, but I think that a belated answer is better than none.
Among the lesser educated young people, many don't even know Dollfuß and Schuschnigg, and the majority of people have kept a very bad memory.
Primarily Dollfuß is still worshipped by many conservative, catholic people. The Austrian People's party ÖVP
and his former academic fraternity Franco-Bavaria
lay a wreath of flowers on his grave each day of his death.
As monuments, I personally know:
* A life-size portrait of Dollfuß in the parliamentary group of the ÖVP.
* A plaque in the abbey of Reichersberg, Upper Austria.
Im you mail the ÖVP or the Franco-Bavaria, they will probably be able to help you out with more information.