The 32-year old defender is believed to be meeting officials from the Northamptonshire club today to discuss personal terms and if agreed, he could be signed in time to make his Poppies debut against Hyde this Saturday.
Mustafa's exit has was placed on the transfer list 2 months ago having failed to live up to his pre-signing hype and failing to command a regular place in Terry Brown's line up.
There is no news on the possible move on either of the two clubs official sites as yet.