Most companies want to become Q1 compliant in order to get their product certified to one of the many API standards, 12F, etc. That being said, you can get certified to Q1 without it if you want to. You will have a hard time showing evidence that you comply with say "non-conforming product" if you don't manufacture. Same with verification of purchased product if you don't purchase products. Quality systems like ISO 9001 are much more appropriate for companies that don't produce products. Can you give more information on why you are looking at Q1?