Technics SL-PJ2 CD PLAYER (1984)

Hi, does anyone know the size or part number of the cd mech drive belt, the smaller of the 2 belts not the eject one the one that moves the shuttle back and forward, i have a few of the 'multi belt kits' you get from amazon but none are small enough, i boiled the original belt and its working again but its stretched and i dont expect it to work forever, thanks