What year and model is your car? The engine mounting differs, and there are several different parts that would attach to the block, depending on the year and model of the vehicle you're trying to equip.
Some cars used the bracket shown below (6030 and 6031) - is that what you're looking for? Mustangs, Torinos and other I6 verhicles used different brackets. Some vehicles had the isolators (6038) attached directly to the engine.
Ebay or bone yards will be your best bet - to my knowledge none of those brackets like 6030 are reproduced.
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