The Senegal striker is set to be confirmed as Chelsea player after the Blues had a £7m bid accepted for the forward.
And Newcastle boss Pardew is hoping Magpies owner Mike Ashley will back his manager in his search for a new striker this month.
“Mike has been supportive, and he has to be even more supportive now,” said Pardew.
“He has to find the extra money for a striker, as we’re not going to get one in for the Ba money.
“There’s always a player who can enhance a team and we wouldn’t be competent if we didn’t look to replace him, which we have. Hopefully we can get that one in.”
Meanwhile, Newcastle are on the brink of completing deal for Lille right-back Mathieu Debuchy.