I have found two solutions without modifications. Buy tactical tailor pouches because they have extra loops for the Molle, which allows you to adjust the size if the gap in 1inch increments, rather than 2 inch like a regular eagle pouch. Also, tactical tailor makes a molle to belt conversion piece for their type of molle clips, but I'm assuming that you can also use other molle webbing systems as well such as the type BHI or EI use.
Making your own conversion piece wouldt be hard either, and it would save you almost $8 per conversion. I found the conversions in TT's radio pouch section.