Some sources for finding KRAS trials I use are:

PanCAN.org -- extremely helpful. Tumor registry, education, trial finder, etc.

National Institutes on Health (NIH) nih.gov -- Search "Clinical Trials"

Facebook group "KRAS" -- They try and gather as much information on research and trials as possible. They have links to educational videos, lectures about KRAS and ongoing research. While, I think, 90% of PDAC cancers have the KRAS mutation, many other cancers can also have KRAS mutations, so it's not just PDAC. There can be overlap between cancers when it comes to KRAS.

cancercommons.org -- for a fee will help you search for trials.

If you are being treated in a research hospital or major cancer center, you should also ask for help from your team. Sometimes these centers will have their own trials. If there is nothing there for you, start searching. There are new developments daily. You may also find other organizations that will help in your search.