Head gasket and Engine rebuilds.

[weka]

XUD headbolts are not stretch type, also should not be re-torqued.

for the price of them its not worth re-using old bolts.

The same ebay seller I bought the top end gasket set from does sell sets of bolts separately.
The gasket set arrived in one week, and the card double wrapping appears to be sufficient for the trip half way round the world.
Googling for rings doesn't show much for xud locally, I think it is likely they dont get rebuilt these days, replacement newer cars are the cheaper option.
Some high performance ring sets claim to be using malleable cast iron, probably similar to what the Super-X rings used.
One local supplier used to supply plain cast iron ring sets to size required, many years have passed, could be worth talking to them to see what they are doing currently.
Will look out for oversize pistons  and doing a rebore, have plenty of spare engines and an unused set of injectors.
Ta