I'm pretty sure Image Lab are the only E-6 developers in Wellington. WPS are almost always a multi day turnaround where Image Lab will do it the same day if you get it to them before 11am.
Film is expensive here. Last time I bought 400nc in 120 from WPS it cost me $16.90 a roll. For 10 rolls, I can order it from B&H and even with the $60usd shipping price, it's the same price. Anything over 10 rolls is savings. It's a shame really. I like to support local businesses as much as possible but sometimes it's just so hard to justify.
I often see people with film cameras about, but more often than not these days it's the younger generation. It's sad, but there are fair few people shooting film, I just guess like me, they're not the camera club types.