But there were 3 different lasts in the "Agent" lineup: 98mm, 100mm, and 102mm. Without knowing which Agent he was in, it will be hard to recommend a boot.
And as always, go see a boot-fitter who can actually see your feet and find the right last/flex for you. Every brand makes good quality boots now, you just need someone who can help select a boot for you, which cannot be done over the interwebz.