where can I buy organic frozen fruit?

[almostenglish]

I'm going to get a vitamix and I'm looking for frozen berries to go in alongside the greens. I want frozen because it's cheaper and I like the thickness frozen food gives to smoothies. Since I'm planning on making quite a lot of smoothies I want the food to be organic - no point guzzling pesticides.

I had a quick look online but you have to pay between £9 and £12 extra because it's frozen and has to be delivered in a special container, so I'm not keen.

Any other thoughts?

Ocado do Duchy organic frozen raspberries - so I presume that you'd find them in Waitrose also?
But most frozen fruit is not organic. Maybe there's a farm shop, PYO or similar near you, selling their own?

Ah! Good old waitrose, I'll check there!

I've got PYO nearby but it's not the berry season anymore, should have stocked up in the summer....