If it is the coaxial jack for the mobile scanners with the female center look for a Philmore 214.
The plug is Philmore 265 and plug with molded wire is Philmore TC265
Philmore 214 DC PCB Mount Jack and 6.5mm x 4.35mm Mate Plug-No.265 is also know as a EIAJ-05 this is a Japanese standard plug for 13.5-18v.
The newer GRE and Uniden handheld scanners also have EIAJ-02 and EIAJ-03 for 6v and 9v The EIAJ-04 looks similar to the 05 but is smaller in size and covers 10.5-13.5v.
Website with picture and for sale.
Philmore 214 DC PCB Mount Jack 6.5mm x 4.35mm Mate Plug-No.265
AR3k,AR5k,AR8k,AR82k,AR86k,SDU5k,SDU55k,ARD25 R10,R20,R71,R72,R75,R7k,R71k,R85k, PCR1k,PCR25k,R2500 PSR500,PSR600,PSR800 RS26,94,97,2035,2055,106,197 760xlt,245XLT, 796D,996T,996XT,396T,396XT,HP1,HP1E