Bottom half of any SEGA branded Atari 2600 shell

[+RichG1972]

I seek a bottom half of a SEGA branded Atari cartridge shell as my copy of Congo Bongo does not have the guide pins that hold the PCB straight inside the shell intact, apparently they broke off during shipping when I got the game a couple years ago and before coming here I figured I might be able to find a non-working copy of either Flash Gordon, Start Trek or Congo Bongo itself I could pull the bottom from but struck out. Can anyone help me out? Will pay.