GTX 750 Ti in low profile there are only 2, made by GB and MSI, you can find them on ebay, both offered by newegg and they are 170$ each and 12$ shipping. You would get a lot cheaper going regular size, but be careful as there are models that require a 6pin power connector, as the Asus version, and it will not power without it. Reference model does not have the 6pin connector.
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