I checked findagrave.com and found Mohan's at Oakwood and Flushing City but not at Crestwood Memorial.No Landis at Flint Memorial but some at New Calvary and Calvary. Both those cemeteries are on FindaGrave and you can go to the Cemetery page and do a request look-up or what has worked best for me is to contact the cemetery by phone or letter--the people that work in cemeteries are generally very helpful! Flint Memorial Park:9506 North Dort Highway, Mount Morris, MI 48458-1234 810-686-3660; Crestwood Memorial Gardens-2020 E Hill Rd, Grand Blanc, MI, 48439-5108
810-694-4101; St. John's Cemetery-502 N. Dayton Davison MI 48423, 810 658-7114
Good luck.