This is the vintage version of this model. I also own one of the newer kits. For part #92 you need a vintage version.
It's a lovely model in its own right, however; the parts you are looking for for your Boba build are:
#65 Connecting Rod for the ESB EE3. this part sits above the, as yet, unkown breech disc.
#92 Cover, Starting Gear Case. This part is only available on the earlier versions of the model, as pictured, or the Renwal version. It is not in the newer kit.
#107 Vibration Damper Pulley, Front Half and #43 Timing Gear, Camshaft Front have both previously been suggested as possible for the ESB breech disc but research has indicated it to be neither of these parts. It's a pretty non descript disc, so it could be anything; we may never know!