[Plossl68 (Paul)]

Hi all,
I've just returned to astronomy after 25 years timeout. I picked up a celestron Nexstar 6SE and love 95% of it. My only problem is the red dot finder which is, um, not exactly the best. Can anyone out there please suggest a good replacement finderscope that I can fit without redrilling the back of the OTA?
Thanks for any ideas.