I heard there was a Grandmothers Marimba Band in the San
Fernado Valley, CA. Does anybody know how they can be
contacted?

hi, i think you may mean the marimba mamas (not grandmamas), one , vera dalen, was a student of mussers at northwestern. they had a recent canadian tour and a cruise booked in october (refer to the last percussive news paper - back page.