i have shared this before. federal procurement database.
https://www.fpds.gov/ezsearch/fpdsportal?q=123456787+truck+VENDOR_FULL_NAME%3A"J+%26+B+TRUCK+REPAIR+SERVICE"&s=FPDS.GOV&templateName=1.5.1&indexName=awardfull&x=0&y=0
i downloaded every contact for genetic duns 123456787 over 25k. all of which are violations of FAR.
there are more, but this one is first on my list.