DSW Fitness
http://www.dswfitness.com/ has courses that can go toward your CEU and they are way cheaper then NASM. NASM seems to rehash on what you learned in their PT course in their extra CEU courses. I did their exercise bundle which is supposed to be closer to their Corrective Exercise Certification for under $300 I believe. Good luck and if you find any good courses let us know...
And NASM PRO on line also gives out free CEU courses (it's not much) but it's free. You do have to be NASM Certified.