Yeah, the lightsaber drop script is based on level. Around lvl 33 you can still get drops, but above that it just becomes impossible since your level is higher than the max. level of lightsaber numbers available after the calculation which color you're getting.
1) Don't cheat yourself that high level, and get lightsabers as regular.
2) Use TSLRCM 1.8 as soon as it's released. Of course it also fixes the Hssiss exploit...