In work related with Positive scalar Curvature, Stephan Stolz (ann.of Math), but later Stolz-Kreck(HP 2 bundles and Elliptic cohomology) introduced a version of Real connective K-homology by considering spin cobordism, localizing at the prime 2 and then killing classes which are determined by bundles with fiber $HP2$.
Is there an analogous version for complex (connective) K-homology?