Hi Tal:
I am not familiar with this chassis to be honest, and can't see all of the power connectors from our review, but in general, there are three kinds of fan connectors out there. The first two are small, and are either 3-pin or 4-pin - the latter has an extra fan so that the motherboard can control the speed if it has the capability to do so. There's also 4-pin Molex connectors, which are the same kind of power connectors that IDE hard drives used to use. Most often, if a fan uses one of these, it will have both a male and a female, so that it won't take one of the connectors from you.
If I understand you correctly, your fans are using those kinds of connectors, and if so, I don't think you have any other option than to plug it right into the power supply. There exist adapters, or convertors, to convert the small 3 or 4-pin power connectors into a large 4-pin Molex, but I've never seen the opposite. From what I recall, you <em>can</em> mod your Molex fans to become 3 or 4-pin connectors, but I wouldn't recommend it as it sounds like a pain in the rear.
Is there a reason you'd rather not use the Molex connectors on the PSU? If your PSU has none left, you might want to be on the lookout for another kind of adapter that will create additional Molex ports, such as a PCI-E to Molex adapter (I am not even positive this exists, but I'm confident it does).