Try this:
shopforoeparts.epc?mode=SPL&makeid=BUICK@@BUICK
This link at your store would load the NON-AJAX catalog and preload the catalog with the make BUICK.
You can try other parameters such as yearid, modelid, engineid, keyword, like the one below
ShopForOeParts.epc?mode=SPL&keyword=ENGINE&catalog=OEM%40%40OE%20Mechanical&resetfrom=SS