The All Blacks and the Welsh region are in talks over the proposed move, which would see Mooar leave Parc y Scarlets at the end of the 2019-20 season.

Foster confirmed talks have taken place, adding: "It's going well. We're really confident and hopeful we'll get a solution soon."

Former Swansea coach John Plumtree has been made New Zealand forwards coach.

Scarlets confirmed "early discussions" have taken place with New Zealand over Mooar's position, adding they "are unable to comment further until those discussions are concluded".

The Scarlets boss says he is torn between staying with his region or joining New Zealand's backroom staff.

"I am torn, yes, this is tough and both options are outstanding," said Mooar.

"It would be a hell of a proud moment [to join the All Blacks staff], it's humbling to be in the conversation.

"The question has been asked, we are grown adults and are having responsible conversations and things will pan out.

"It [Scarlets] is a wonderful place to be and we are enjoying a great rise. The way we are playing the game and the fan base is bigger than one person and it's an exciting time."

Ian Foster (right) with his predecessor Steve Hansen at the 2019 Rugby World Cup

Mooar insisted if he were to take up the New Zealand offer, there would be no lack of focus at the Scarlets, who beat Bayonne 46-5 in the Challenge Cup at the weekend, for the rest of the season.

"It would not be difficult at all, the focus will remain," said Mooar.

"We have set a vision and are working together and our noses are in the same direction.

"We are on. We can't wait to get to work on a Monday and it's a group thing. I am proud to be here."

New All Blacks boss Foster succeeded Steve Hansen, who left the post at the end of the World Cup.

Plumtree and scrum coach Greg Feek will join the set-up while defence coach Scott McLeod and selector Grant Fox remain in their roles.

Mooar is in his first season of a three-year deal with Scarlets, having replaced fellow New Zealander Wayne Pivac, who left Parc y Scarlets to take over from Warren Gatland as Wales head coach.

New Zealand's new forwards coach John Plumtree spent almost five years in charge at Swansea, leaving in November, 2001

The 45-year-old has made an impressive start with eight wins in his first 11 matches in charge.

Mooar was assistant coach at Crusaders for four seasons working under Scott Robertson.

He was also head coach at Mitre10 Cup side Southland Stags, as well as backs coach with South African sides Eastern Province Kings and Southern Kings in the Super 15.