I have some of these available -- high voltage (Vceo 700) / High current (Ic - 8a) (Pt 150W) -- TO3 package -- intended application is horizontal deflection but I have used them in high voltage regulator circuits and as a replacement in switching power supplies, ST Micro, (not Toshiba) -- $1.75 in singles/$1.65 10 up. contact me at jack@tech-diy.com if interested.