The slightest bit of wear on any of those linkage bearings and collars contributes to the overall freeplay in the linkage and is often the cause of MOT advisories or fails. Yours is obviously toast.
If by 'getting a second hand part' you mean buying a complete linkage with bearings and collars etc off a breaker or ebay, you might get lucky. Then again, you might buy a worn unit and be in much the same place as you are now.
I'm guessing you want to sort this cheap as possible, in which case I'd be more inclined to replace all the bearings (not expensive from BikeBearings.co.uk), salvage the seals and two original collars and buy a new collar (only available from Yamaha).