need cisco 3640 ios

Hi there,
i need cisco 3640 12.4(6)T ios?
or other ios that support ipsec ( crypto commands )
thanks

is it urgent to be 3640 model??
or it can be any other model that supports IPS ??

i have 3640 cisco router
i need to configure VPN into it so i need any ios that supports vpn

عندي بعض نسخ 3640 ولكنني لا أعلم أيّ منها قد تدعم IPS.

عندي
c3640-ik9o3s-mz.124-10.bin

و

c3640-js-mz.124-10.bin

هل يدعمُ أيّ منها ما تريد؟؟؟

the second option