Um wow.
Anyway in 2000 Pat Buchanan's best states were North Dakota, Alaska, Idaho, Wyoming, and Montana. Although in none of those did he get more than three percent. His best counties were Kidder, Logan, Cavalier, Billings, and Grant all in North Dakota. In Kidder he got 9%. Leip's Presidential Atlas is my source.
2000 Presidential Election Statistics
The Constitution, formerly Taxpayer, party is sometimes seen as Paleoconservative. Sanpete county Utah has been consistently among the top five counties for the Party since 2000 or earlier.
Although probably not "Paleoconservative" Rockford, Illinois is the home of some important Paleoconservative organizations.