I would love to see a map of the county by which cities and Congressional districts Bush won.
I don't have a map of this data but I did find the two links below which have data for Los Angeles County broken down by supervisorial district, congressional district, senatorial district, assembly district, board of equalization district, and cities. If you look else where in this book you can find this for other counties and other elections in 1988. Also, you can find this book for many other election years by searching the search bar at
https://archive.org/.
Links:
https://archive.org/stream/statementofvote81988cali#page/30/mode/2up,
https://archive.org/stream/statementofvote81988cali#page/32/mode/2up