first of all, you mean output, not input (sorry, it’s just harder to read that way).
second – it sounds like you probably can’t do this. DisplayPort is splitter-friendly (the spec technically allows you to do like 3 displays per port, up to the card’s limit, which is usually higher than the number of outputs on the card itself), but high refresh rates generally aren’t splitter friendly, and you’d have to try and return a bunch of adapters to amazon to be sure. But, regardless, I can tell you that your solution is going to involve ignoring the DVI entirely, if one can even be found; DVI is best thought of as strictly a legacy standard, and it’s true, there’s no hardware that will let you go DVI->DP.