Based on the experience you had (reading your other thread), I imagine it should go without saying that you'll be looking to get your rabbit from someone else.
I think it would also be wise, if you haven't already, to do some further research on the care of rabbits in general. Rabbits have particularly delicate digestive systems and knowing what to feed, what
not to feed, and how much of what to feed are all critical facts to know.
The age of your rabbit is also critical to know. Young rabbits have different dietary needs than adult rabbits. (They are considered adults at 6-7 months of age.) And as has been stated, look for one already 8 weeks of age at least.
If you are planning on getting a young rabbit (I assume there are not rabbit rescues there that sell already fixed rabbits?) then I would encourage you to get just one. If you get two, they may not get along once hormones kick in.
I don't know if the breeders there offer any sort of guarantee either. I would think a breeder would take responsibility for rabbits that die within 4 days -- provided they were cared for as instructed.
When you get your rabbit, ask lots of questions...
how old is this rabbit?
what has he been eating?
how much?
can I have some of the pellets he has been eating? (where do you buy them?)
has he been fed any greens?
has he been eating hay? (where do you buy your hay?)
As for preparing for the rabbit before you leave home, during the ride back, and once you get home, please take a read on
this page for details.