In reply to kingjam:
Arc'teryx Theta SV bib, Beta AR and Alpha SV bib come in 'tall' sizes but are rare as rocking horse poo and are only good if you like black this year.
Their tall sizes are supposed to suit up to 35" inside leg but the true length is 33.5" The Beta has a normal athletic fit the Theta bib runs quite tight in the thigh.
Can't go far wrong with the Beta AR. They are probably the best all round mid-weight hardshell trousers out there. I'm on my second pair in 8 years and will most likely get a third.
I feel your pain though. Finding good trousers for long legs is an unnecessary mission in life.
Edit: The beta Lt also comes in tall size if you are looking for something more lightweight.
Post edited at 08:47