Jeff,
My vintage Ritchey Outback frame presented a similar set of circumstances as your conundrum. I too prefer drop bars and wanted the Crust Shaka bars on there. I'd tried cantis, but the frame lacks most of the good cable stop placements, so I went with a stem integrated cable stop that with the fork, head tube and stem flex introduced a lot of dissatisfying jutter to the front brake. There are no DT shifter bosses and for "reasons", I didn't want barend shifters. (I didn't really consider stem mounted shifters, but given my setup I don't think they'd work either.)
So, want to do when you want dropbars, no cantis, and have limited shifter placement? I went with Paul Motolites and Gevenalle Audux "brifters." (Paul Minimotos were no-go cause I want to run 55mm tyres) I believe the Gevenalle's are based off the Tektro RL340 Brake levers. They're definitely short pull, but honestly they work very well with the Paul Motolites. Snappy with a ton of power, can easily send you OTB if you're not careful. I mounted some Diacompe friction shifters to them and loving my 3x7 DT. Really my only complaint is that shifting from the hoods you can sometimes also engage the brake lever to easily, something I do occasionally with the RD/Rear brake.
To say this setup isn't for everyone is an understatement. But if you or anyone else out there are trying to make v-brakes, "brifters", and dropbars work, I can say that the Gevenalle/Paul MM setup works for me.
Ben