If you're going to TT on the Peugeot, how you fit on the bike trumps aesthetics. With that in mind, I'd ditch the quill stem for a quill to ahead stem convertor. You'll have much more scope for adjustment - and less flex. Good luck.
I've got a fair whack of vertical adjustment with a quill tho, no? Plus they left a spacer stack when putting the headset on (at my request). And I'll be sure to set the position to my road bar drop position before taping and what not.
If you're going to TT on the Peugeot, how you fit on the bike trumps aesthetics. With that in mind, I'd ditch the quill stem for a quill to ahead stem convertor. You'll have much more scope for adjustment - and less flex. Good luck.