Looks like Bunnings have reduced prices on some spirit levels which are good deals if you don't want to buy the pack from Aldi:

Craftright 1200mm Spirit Level (was $14.98) $5.98

Craftright 600mm Aluminium Spirit Level (was $12.95) $5.98

Craftright 230mm Magnetic Torpedo Level (was $3.25) $3.00

Credit to Pricehipster.com