Here are some other map resources
Maps of the individual precincts can be found at the Ramsey County Elections website.
For the record, here is a map of the “old” SD64 as of January 2012. The court split pre-2012 Saint Paul precincts. Old precincts 1-1 and 1-2 were split between SD64 and SD65 and 4-1 and 4-2 are split between SD64 and SD66. Old precinct 3-13 lies mostly in 64A but has had a small piece moved to 64B. Here is a map that overlays the new SD64 on the old Saint Paul precinct map in some detail.