Originally Posted by
Kommisar89
Any particular reason? I thought all Shimano indexed deraileurs since like 1984 had the same pull ratio and as long as you had the correct derailleur for the max cog/max tooth difference then all that mattered was that you matched the number of cogs to the shifters. Or is this something Dura Ace specific? I haven't tried it but I would think that his combination would work fine with 9-speed DT Dura Ace shifters. They are plentiful on eBay.
If neither cobwebs nor calcification have snuck up on me, I seem to recollect that sheldonbrown.com reports that all Shimano SIS rear shifters work with all SIS rear derailers; however, that only SIS front 'mountain' shifters work with SIS 'mountain derailers'.
So the OP should be good with Dura Ace 9 speed downtube shifters and his Deore rear derailer.