Data for producer prices for products
If you are looking at US producer prices then the Bureau of Labor Statistics is where you would go to find the data.  Producer price indexes are here: https://www.bls.gov/ppi/

If you are looking at other countries producer prices then I would recommend  the OECD:  https://data.oecd.org/price/producer-price-indices-ppi.htm

Or this site as well:  https://www.economy.com/indicators/producer-price-index-ppi