We have discussed in the past a few NZ shops that do imported UK goods, i often use my local one to grab a few packs of Walkers crisps each month.
But reading the local magazine this week i saw an article interviewing a local couple that have started a similar business of UK goods, and do free home deliveries (to wellington region anyhow). And reasonable delivery costs to rest of NZ.
AND, they do some groceries far cheaper than other similar shops. Leccy-Lee might be placing a home delivery for some crisps
Although there range of goods seem far less than my local uk store, thought i would add this one to your lists anyhow.
http://www.portobelloroad.co.nz/