How to gift a sims pack even though I own it?

I was preordering an expansion pack for a friend, but didn't know you couldn't do that and ended up buying it for myself. I was going to try to refund it, but saw that I can't refund sims packs. So now I just want to buy my friend a copy of it but there is no option on the store to do so, it only says "view in library." Is there any way to buy the sims pack for my friend even though I already own a copy?