I don't think we'll find an ideal solution for you here. We also do not offer individual Eiswolf AIOs without a radiator. That would blow up our portfolio. Unfortunately, it is not possible to cover all wishes. Otherwise we would have AIOs with 240, 360 and 420mm radiators, the coolers only with the pump unit without radiator, only the pump unit and the whole thing best still pre-assembled with an Eisbaer CPU AIO, of course in the desired hose length, so that everything fits well in the many different cases.
I understand your desire to make a simple change here. But I hope you understand that we also have to set limits for our own economy.
But I still recommend you to google and look at a conversion. Maybe the conversion is not so difficult for you. As an official representative, I have to advise against it. But that doesn't mean it's impossible.