The main source is amkproducts.com. AFAIK everybody else re-selling AMK by buying in volume with volume discounts, maybe, and re-selling with some markup. Might be best to check the main source's price first, keeping in mind they do have a $30 minimum order.

https://www.amkproducts.com/bulk-fasteners-listing/?codeforlookup=7060
and scroll to bottom. These parts are correct to the original Chry part numbers. $28/pair + $10 ship = $40 due to min order. This is without the nuts, which are also available elsewhere on the web site. For nuts, go to https://www.amkproducts.com/ > catalogs > hex nuts.