Have you tried the chainman ltd in CHCH. they have everything related to chains and recovery gear. They extended my 31 chains to 33 for 100 bucks. Think they might be cheaper for a set rather then the regular auto shops/4wd shops. Might be worth the freight. Al
I got mine from Chain protection services in CHCH, each set suitable for 33 inch tyres, they were bar/ladder type heavy chains with ice breaker lugs, and very competitive on price.