Grafting may be an option, but the attached page out of "Propagation of Pacific Northwest Native Plants" (an OSU Press Publication) provides details for propagation from seed and vegetative propagation.  If you want to try grafting, anything in the Vaccinium genus is theoretically compatible, but practically speaking many Vaccinium species may not work well.  Something with a  similar growth rate is important for the graft to remain viable long-term.  I would try seed or cuttings according to the attached first though.