Withyhays occasionally has beautiful well-bred and carefully raised Tri-Colour Dutch (or other colour Dutch) babies available to first-class pet homes. I only have one or two litters of this breed per year.
Polish rabbits do not make good pets - so they are only available to other breeders or highly experienced rabbit owners who understand their requirements.
A pet rabbit is quite a commitment and not a cheap and easy pet by any means. Adding any new animal to your family requires a lot of thought and research: rabbits can live for 7-10 years or even longer. Although the price of a new rabbit is relatively low, the outlay for suitable housing is not, and there will be ongoing costs such as annual vaccinations, neutering/spaying, maintenance of the living quarters, as well as the weekly cost of feed, bedding, hay and fresh food. For some good advice on keeping rabbits as pets, look at the Rabbit Welfare and Advice website, particularly this article, before you decide:
https://rabbitwelfare.co.uk/rabbit-care-advice/ownership/think-you-want-a-rabbit/
I would also recommend you read up on the RHD2 virus which is endemic in the UK, and is killing unvaccinated pet rabbits, wild rabbits and also wild hares. For the reason of this virus, I deeply regret I can't allow visitors to my rabbitry, where I may have babies too young to be vaccinated. I hope you will understand this is a necessary precaution for biosecurity.