Can I substitute coconut milk with evaporated milk?

Hi everyone.

I’m about to start making a coconut cream pie today.
Link can be found here :
http://www.marthastewart.com/recipe/coconut-cream-pie

I tried finding three cups of unsweetened coconut milk, but when I went to the grocery I found only 12oz of Coconut milk. My recipe calls for 24.

After searching the store, no more coconut milk could be found.. so I picked up a 12oz can of evaporated milk.

Will I be able to substitute those extra 12oz with evap. milk? Or should I go ahead and spend today looking for more coconut milk at another store?

Just thought I’d ask. If I can substitute, that’d be amazing. But I’m pretty new with baking and am interested in what everyone thinks.

Thanks!