Si Ferry reckons Celtic have the perfect replacement for Kieran Tierney in loanee Diego Laxalt and need to push the boat out to ensure they sign the full-back on a permanent deal.
The defender is yet to taste victory in four games under Neil Lennon but has looked a quality addition so far.
His superb performance last night against Lille underlined his value to the team and showcased both his defensive nous as well as a tangible attacking threat.
And the former Hoops kid jokingly suggested that his old side should consider "sponsored walks and car boot sales" to ensure they have the funds to make a permanent deal from AC Milan possible.
While much of the praise for last night has been aimed in the direction of Moi Elyounoussi after his brace, Ferry thinks he's performing better because of the standard of player now behind him on the left.
He told Go Radio: "Elyounoussi has been helped by Laxalt coming in.
"What a signing he is by the way. He does the work of two guys.
"If I'm Celtic I'm doing sponsored walks and car boot sales to buy that guy because he looks like a ready made replacement for Kieran Tierney.
"That's how highly I rate him.
"It's due to his competitiveness, his fitness and his quality on the ball. He's really helped Elyounoussi massively."
