Am I just supposed to make my own breeding box?

I have a new litter (Cremello with a Rabbit white) and 1 of them was born with only one nostril working properly. He / She is eating and breathing fine but I’m a bit worried about the / her chances of survival and I really wanted to keep this one as it’s the prettiest of the litter. <br><br>My main concern is temperature, I’ve read that baby bunnies don’t have any fat / fur yet to stay warm so staying warm is a huge concern so my plan was to acquire a professional breeding box. <br><br>There seems to be no one that sells these in my country. I’ve seen them in pictures to know they exist but NO ONE sells them. Is it supposed to be a normal baby box or something?<br><br>How does everyone else handle all the incubation / heat / humidity etc. for babies? unless I’m just going crazy I can’t find anything that meets all the conditions. <br><br>I just don’t want to mess up / kill this little rabbit.