Mountain-Wanderer I'm pretty sure mine was from ozscopes too (can't really remember where I got it though
) as I've got a voucher from them here you might be able to try. It's just on a leaflet from oz-hut which i think is just an umbrella company for others including oz-scopes.
It just reads:
Coupon code: 5OFFOZ
$5 off all orders for all stores