johnny pinball

hello discerning drivers where can i buy a vacuum advance for my 1994 2wd hilux 22r rn85r ute? it has blown out and you can toot air right thru it , so vacuum advance is not working on the dizzy i think the dizzy is 19220-35160 or maybe this is just the pot i wonder if there is a single port one on some other dizzy thats good if i dont want to bother with emmision stuff maybe the whole dizzy is 19100-35160 ? thanks for any help regards john