DoorKing 1815-330 Proximity Card Reader

Our community has a doorking model 1815-330 entry control system which uses passive proximity cards. However when it is raining or very cold you must put the windows down on the card and touch the card to the reader to gain entry. My question is if there is an battery operated proximity card which would increase the distance from inside the drivers side window to operate the system without rolling down the window and if so, how much would a dozen or so such cards cost? Thank you for you time, Phil Robinson