You really should be looking at do-160D, this has captured all the req's of version C and improved upon them where required, what are you specifically looking for, I may be able to help
It all depends on what enviromental category you are looking at, I would have to check the mil std to see what it actually pertains to.
If you are working on a mil product but have gone down the road of doing do-160 testing which is more commercial, then the military will allow do-160 equivalent so long as you have done the analysis between the two specs. you will find that in most cases mil std's and do-160 are very close, their regs can be a bit tighter when it comes to freq radiation or Vibration.