The England international has been identified by the Red Devils as a solution to their centre back conundrum, but reports suggest a fee in the region of £80m will be required to lure him away from the King Power Stadium.
The fee would make him the most expensive defender of all time, surpassing the £75m Liverpool parted with for Virgil van Dijk in January, but Jose Mourinho remains eager to make him his fourth signing of the summer and is reportedly prepared to fund the move with the sale of Marcos Rojo.
Speaking on Sky Sports' Transfer Talk podcast, Dorsett claims that Maguire holds a desire for a move to Old Trafford before the transfer window comes to a close: "We know he does want to go to Manchester United," he said.
"He does want to go to Old Trafford. That’s been made pretty categorical to me in the last couple of days so you know that plays into the thinking of Leicester a little bit.
“I can’t see them letting him go, I just simply can’t even if Manchester United come back with a world-record bid, more than the £75m Liverpool paid for Van Dijk.
“I think Leicester will say no but what happens then with a potentially unhappy player going forward? Well we wait to see."
Leicester, meanwhile, have no intention, or need, to sell Maguire having already sanctioned Riyad Mahrez's £60m move to Manchester City, where they still hold the hope of the 25-year-old agreeing to new terms with the club.
On the Foxes' stance, Dorsett added: "They don’t need the money. They’re very wealthy owners anyway. They’re nowhere near Financial Fair Play. They’ve got cash to spend. They don’t want money in for him, they want to keep the stars.“The difficulty Leicester have is in attracting players."
The ex-Hull defender has seen his value skyrocket over the last year having impressed in England's run to the World Cup semi-final and in his debut campaign for the Foxes, where his prowess in the final third was also on show having made five goal contributions in the league.