Dell Wireless 5620 Mobile Broadband Driver for Windows 8

I recently purchased a WAN Broadband card for my Alienware M14x.

Wireless 5620 Multi-Mode Gobi Mobile Broadband Mini-Card for Select Dell Systems

Dell Part#  : 313-9379

My Laptop runs Windows 8. I cannot seem to find a suitable driver. Does anyone know if a Windows 8 driver exists for this card

Thanks

Anish