IC alternative DS1305 / Making RTC without using DS1305

Hi guys! I was wondering if there are alternative IC that can be used in RTC because i think DS1305 isn't available in our country or i think i just don't know any suppliers for it.

any ideas on how to make an RTC without using DS1305 ic?

A DS3231 seems to be a good alternative, the DS1307 is cheaper but doesn't have the alarm output feature.