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Only Cisco, itself, can "officially" answer this question, and Shillings suggestion is a good way to obtain that answer.
However, very, very likely answer will be no. Almost all vendors will not support Brand X in their equipment. If you have a problem with those stack cables, most likely Cisco will ask, does problem occurs with our cables? If answer is no, then Cisco will likely say, problem solved, i.e. use our cables.
Basically, this would be likely similar to using non-Cisco optics modules.
