This is really the only place you can purchase pipe tobacco here in NZ. Have a look to see range and prices:
Buy your Pipe Tobacco online from Canteros New Zealand - your source for Ashton, Peterson, Lane, Erinmore, Davidoff and Drew Estate Pipe Tobacco .
www.canteros.nz
You are looking at roughly $3nzd per gram if you buy while here. Whereas any tobacco you bring with you is taxed around $90nzd per 50g. Depending on how cheap you can pick up tobacco where you are, or en route, this is much cheaper.
You can bring as much as you want with you for personal use. Your first 50g is duty free and does not need to be declared. If you choose to sneak tobacco through and are caught (I’m not advising how likely this is) you will have all of your tobacco confiscated and fined at least $400 - possibly more if you were bringing in 20 tins as NZ doesn’t have a pipe tobacco culture so they would assume it was for resale.
If you declare 20 tins, it will not be confiscated unless you choose not to pay the duties - expect to pay around $2000nzd for this amount.
And in regards to your question about Lakeland’s availability down under. Currently there is none. If you find yourself in my region (Tauranga) message me and we could swap some samples or something