Just find this site, maybe these guys can give you the information you want.

His headquarters then where still in Germany, Regensburg, near the Czech. border: "We had a 250 mile drive to Pilsen on Sunday morning and stopped at the HQ of Patton. Third Army in Regensburg, Bavaria, Germany. This was the location of his final combat HQ and as military governor."

Website:http://blog.tridentleadership.com/history/blood-and-guts-expedition-patton/

Cheers,
Gunwolf