Overhauling the transmission will deliver better results when as many of the wear and damage prone components as possible are replaced.
Interfacing used parts with new may lead to premature wear of the new parts, and a less smooth, more recalcitrant transmission action.
Other transmission related parts you may wish to consider:
Add as many components as you wish to the same shopping cart, new washers 091812516709167250120821120341 circlips & bearings 09262250510926320027 for example, and still only pay the same single fixed price shipping cost.
Pro-workshop gasket sealant 08C70K0234M easy to apply with great results.
This component may have other applications within the Suzuki model range, so check by part number rather than the description.