Hi Kshitij,
It will take some effort to get 45 PDUs that quickly, but it can be done. I would recommend that you look into a mix of Category A, C, and F PDUs. I'll explain a bit about each category below.
Category A PDUs are typically earned by taking courses from PMI Registered Education Providers. There is no limit on the number of Category A PDUs that you can earn per cycle. OSP International offers a paid product called the
PDU Podcast
which qualifies for this category. You can learn more at the link provided.
Category C PDUs are Self-Directed Learning. You earn PDUs in this category by learning on your own -- such as reading a PM-related book, listening to a podcast, etc. There is a limit on Category C PDUs of no more than 30 per certification cycle. OSP International has the
PM Podcast
which qualifies as Catgegory C. The PM Podcast offers a free version where you can access the last 10 episodes, as well as paid versions. You can learn more at the link provided.
Category F PDUs are earned by working as a professional project manager. If you work full time as a PM, you can claim 5 PDUs for each full 12 months of work since you earned your certification (or last renewed it), with a maximum of 15 Category F PDUs allowed.
I encourage you to review the PMP Handbook, available through PMI's website. It fully defines each of the PDU categories and what is allowed. A mixture of the different types will probably work best for you. Good luck!
PS - Later this fall, the PDU rules and requirements are changing. If you only have two months left to go it shouldn't affect you this time, but I encourage you to
read about it
so that you're prepared next time around!