All bearings and the like are available from any bearing supplies store. Rod will be the same as a Cr250 92-02. Gasket kits are available aftermarket too.
Thanks All,
Enduropuro won't ship to NZ.
Bottom end Gasket kits are hard to find, may need to purchase from multiple suppliers but have a US supplier who may have all of it.
pretty sure motocrosscentre will ship to NZ, they used to ship to eswatini (and most people don't even know where that is!), may just need to send them an email