My fiance has a vasectomy. We can't afford a reversal but desperately want a child.?

Is it possible to take sperm from him with a needle? We're at witts end! We want a child but don't know if we will ever be able to afford what it takes to correct the issue! The worst part is his ex wife is the one that convinced him to do this! He later found out she was cheating on him and they divorced! It was free to have it done why is it so expensive to correct when your ready?????