Selling Industry Carrots in Poland?

Anyone knows where to sell industry carrots in Poland?

What are industry carrots?

Industry carrots are carrots used for making frozen vegetable (cutted and mixed together with other vegetables). Industry carrots are general very big carrots, straight and up to 50 cm long.

Hope that's answer enough :-)

Probably easier to buy than sell in Poland - it's a major agricultural producer. Hortex are the big frozen vegetable company, though I'm pretty sure they buy locally.