VH 24 power booster

[fcwrangler]

I've just been cleaning out my small shed and came across this power booster, from what I can gather ,this is the correct type for early drum brake systems. Can anybody tell me where would be the best place to get reconditioned in the Sydney area. It also has a nasco tag on it with the part no.7414634 and model no.2.
Thanks in advance, Jim
ps, no it's not for sale, it's going on the sedan