Yeah, I can aid you with prep company that offers the SAT Subject Test sample papers on their website.
It's TestprepKart. Finding general SAT practice papers is very easy and it's super hard to find SAT Subject Tests.

College Board released some practice books of SAT Subject Tests.

Those books are unable to garner attraction as the solutions in those practice tests are not in detail and unsatisfactory. So a prep company from a Middle Eastern country made the video solutions and selling it now.
Check the [url=https://www.testprepkart.com/campaign/sat-test-series-&-solutions.php]SAT Test Series[/url] for more details.