McDonald's bought the chain from Progressive Enterprises in 1996 and began to close the restaurants down. The last outlet was shut 14 years ago.
Mr Duffield has driven more than 3000km gathering signatures in the past two months.
He has taken to the streets of Christchurch, Wellington, Auckland, Tokoroa, Whakatane, Rotorua, Taupo and Tauranga to collect signatures for his petition.
The pie enthusiast has already handed 6831 signatures to the head office of McDonald's NZ and is now back on the streets collecting signatures for round two.
"It's about getting McDonald's to reinstate it," Mr Duffield said. "They are quite happy for me to continue doing this."
But even if the chain was reopened the pies are unlikely to be the same.
Mr Duffield said the original recipe would not comply with today's standards for fat and salt content.
Tauranga McDonald's franchisee John Warden said he was unsure how the pies would fare with people's palate these days.
"It was an enjoyable experience in its time but whether it's a viable business model now I don't know."