Or would the 9 speed rear mech work on a 10 speed SRAM Apex 11-32 cassette? This could be a solution.
My LBS (my real one! Sigma Sport) said they thought I could use a Deore rear mech with a new SRAM Apex 11-32 cassette.
34 is like geriatric don't you know )
It did, it's just that Evans so confuddled my mind that I'd given up hope!