I ended up with a Disc Trucker.
I was tempted by a Shand, but less so be the extra cost.
The Croix de Fer seemed to be between seasons - the 2017 version wasn't available as a frameset in the size I'd have wanted, at least on a quick search, and 2018 wasn't out yet. I had a similar failure to get a CdF once before - I spotted a 931 stainless version parked round the back of the Hop Pole (after one of Blacksheep's Audax events, presumably), but when I went online to look, there were only small sizes available, and the following year's version was spoiled by a PF30 BB.
I was also tempted by a Rodeo Labs Flaanimal, but again, not currently available in the right size.
I had originally intended to just transfer all the bits off the Peregrine, but it ended up a bit more of a rebuild than that.
The original chainset, a TA Zephyr, turned out to have one of its bolt holes broken off, so that had to be swapped.
I swapped the BB7 Road for BB7 Mtn, the front disc from 160 to 185, the brake levers to Tektro RL520, new chainrings, chain, cassette, new Ultegra bar end shifters (the old ones being knackered), new headset, new BB, new mudguards, new cables, new bar tape.
I've kept the wheels, handlebars, seatpost & saddle, RL721 interrupter levers, front and rear mechs (not counting the jockey wheels), and front light.
The rear rack (Tubus Cargo) and rear light (toplight line) came off a different bike - the rack on the Peregrine was a 24" wheel rack, the lower braze-ons on the Peregrine being up above the seatstay-mounted disc brake.
The RL721 interrupter (crosstop) levers are road pull and don't work too well, so they will need to be swapped for RL741.
It's currently got a Look Ergostem on whilst I fiddle with positions, but that will get swapped out in due course.