Andy when i've been looking for bits for my mates 6.5 td chev i've brought some gear from http://www.northernautoparts.com/ and http://www.rockauto.com/ with pretty reasonable pricing and delivery charges ..... rockauto ships out her normally within 5 days but the freight is higher than northernauto who take just a little longer.
I've also brought some parts off Ebay usa and have had good deals there too.... it just depends on how far you want to go with your rebuild.
For example i just brought a complete timing chain and tensioner set for a VZ Commodore for $249.00 USD that would have cost me nearly $1500.00 NZD here and would have cost me about $620.00 to get shippped out from Brisbane.
ended up getting them from riffraff, around $1070. bought 3 kits and some head studs and on the kit i will use myself getting the pistons ground to take the sharp edges off the dish.
ended up getting them from riffraff, around $1070. bought 3 kits and some head studs and on the kit i will use myself getting the pistons ground to take the sharp edges off the dish.