Wow, great scores!
Since you have about 14 days, there are some steps you can take to improve your GMAT quant score. You will need to study each quant topic "with a fine-toothed comb" to determine your exact weaknesses.
For example, if you are reviewing Number Properties, be sure that you practice 50 or more questions just from Number Properties: LCM, GCF, units digit patterns, divisibility, remainders, etc. Once complete, do a thorough analysis of each incorrect question. If you got a remainder question wrong, ask yourself why you got it wrong. Did you make a careless mistake? Did you not properly apply the remainder formula? Was there a concept you did not understand in the question? By properly analyzing your mistakes, you will be able to more efficiently fix your weaknesses and in turn improve your GMAT quant knowledge. Number Properties is just one example; follow this process for all quant topics.
Each time you strengthen your understanding of a topic and your skill in answering questions of a particular type, you increase your odds of hitting your score goal. You know that there are types of questions that you are happy to see and types that you would rather not see, and questions that you take a long time to answer correctly. Learn to more effectively answer the types of questions that you would rather not see, and make them into your favorite types. Learn to correctly answer in two minutes or less questions that you currently take five minutes to answer. By finding, say, a dozen weaker quant areas and turning them into strong areas, you will make great progress toward hitting your quant score goal. If a dozen areas turn out not to be enough, strengthen some more areas.
Regarding practice exams, you probably don't need to take any more. Rather, spend your time strengthening your quant skills so you push your score to Q50 or Q51.
Finally, you may find my article helpful regarding
how to improve your GMAT quant score.
Feel free to reach out with any further questions. Good luck!