foreUP/E-Range Integration - Key Fob Use

Recently we integrated our foreUP system with E-Range as we have an E-Range ball dispenser. I know foreUP does not directly support the key fob functionality that E-Range has, but I was curious do any courses have a work around to using those key fobs? Our goal is to have customers load an amount onto a fob and use it at the dispenser. I believe we can load onto fobs directly via E-Range and then mimic the "sale" in foreUP but was curious if other courses do anything similar. Thanks in advance for any feedback.