Managed to snap the rear shock mount bolt on my Sub5 the other night.
Can get new bolts from Orange and figured it would make sense to replace the other bolt also (nine years old), parts here: http://www.orangebikes.co.uk/components/#bolts
, and a handy explanation on how to get the correct size here: http://www.orangebikes.co.uk/support/faq/shock_bolt_length
Rear mount is whisker under 31mm, so that's OK, front mount is measuring up as about 27.7mm, which is somewhat less than 29mm.
So, is he 29mm the correct size, and/or does anyone have a contact email address for Orange - can get post or phone but email would be easier.
Build it like you owned it!