The Magpies have been targeting Brentford forward Yoane Wissa, seeing him as a direct replacement for Callum Wilson rather than an alternative to Alexander Isak.
Recent reports suggest Brentford have slapped a hefty 60-million-pound price tag on Wissa, a figure that Newcastle's ownership is unwilling to meet.
Sources indicate that 40 million, likely including add-ons, represents the club's absolute upper limit for the 28-year-old, who is entering the final year of his contract.
Despite the standoff, Wissa is understood to be eager to join Newcastle and has voiced frustration at Brentford's handling of previous promises regarding a move.
Brentford, meanwhile, appear prepared for the potential departure of their forward, having already signed Dango Ouattara from Bournemouth as cover for Bryan Mbeumo.
However, they are unlikely to let Wissa leave until another signing is secured, leaving Newcastle in a delicate position as the window ticks down.
The situation underscores the challenge Newcastle face in strengthening their attacking options. With time running short, the club must decide whether to push for a deal within their budget or explore alternative targets.
Alexander Isak has finally spoken out on his uncertain future at Newcastle, admitting that leaving the club could be "in the best interests of everyone" as speculation about a blockbuster move to Liverpool intensifies.
Newcastle United have announced the signing of attacking midfielder Jacob Ramsey from Aston Villa, with the transfer fee remaining undisclosed.
Brentford have smashed their club transfer record by signing forward Dango Ouattara from Bournemouth for a reported 42 million pounds, surpassing last summer's 30 million pounds record for striker Igor Thiago.
Brentford manager Keith Andrews has omitted Yoane Wissa from his squad to face Nottingham Forest in their Premier League opener on Sunday.
