Recently Restructured Business - They had to close its doors due to t... read more Recently Restructured Business - They had to close its doors due to the economy and overhead. We are now offering mobile RV repair and service only through Simpson’s RV Specialists. Mobile line 209-224-7667 Simpson's RV Specialists has been servicing RVs since 2001. We offer mobile service to the surrounding areas Flag City RV Park - KOA/Tower Park - Duck Island - Delta Loop - Lodi - Woodbridge - Lockeford - Morada - Stockton - Galt - Herald - Rio Vista - Acampo - Thornton - Walnut Grove.