Tiagra triple front mech

whoof Posts: 756
edited August 2010 in Workshop
i've got a braze-on Tiagra triple front mech that's stopped working. I've bought a replacement Sora
http://www.ribblecycles.co.uk/sp/road-t ... HIMGRFR630
but the design seem to have charged the inner plate is now a lot fatter and this does not want to work with the chainset I'm using, Tiagra triple with square axle.
I've seen the older style ones on Ribble but they have run out
http://www.ribblecycles.co.uk/sp/road-t ... HIMGRFR640

Does anyone know where I can get an older style one or an alternative.