R6 Upgrade shock - looking for top bush

[Philk]

Supplies of the 2008-2016 shock are still plentiful, would it not be cheaper / less hassle just to replace the unit?

This crossed my mind, but how much can a 25mm long piece of rubber be? (Can press it in myself so no labour charges to consider) plus sometimes it is better the devil you know (I hope). Most the shocks I've seen the last couple of days are around the 100 quid mark with unknown history. This is at least option B if all else fails.