Is Get Wines Direct https://www.getwinesdirect.com/ the only online store that allows to you pick and choose your own dozen bottle mix of reds/whites/sparkling wines?
I am aware of other stores that have pre-determined mixed cases, but none that will let you pick the varieties and quantities you want.
I work for www.winedirect.com.au and we do the whole mixed pack thing. However, if you wanted to choose your own selections of wine, we can sometimes sharpen the pricing on the website listed prices, it varies from one to another. If you wanted to know more, just flick me an email at [email protected] and I'd be happy to have a chat about building your own pack.
Cheers,
Dan
Naked wines is another one, although they go with an "Angel" membership scheme. I like both in their own ways but I find buying less than 6 bottles of any particular wine annoying, so perhaps we're after different things :) Both have referral schemes for new members.
Other than that take a walk to your local Dan's.