I don't actually know them, I just recognize the name and logo as something I've seen on FB before, but looking it up now I guess they aren't part of that group, maybe they use to be but have since left? or could have been on another group or someone shared a pic post from them. In any case I think it would be better discussed with them yourself though, since you are the one buying the chin. Even if it's not normally their policy they may be willing to make an exception if you take the chin the vet right away (as soon as the vet can fit you in), just to verify that it's healthy. If they stand by what they breed they shouldn't have a problem with that. A wellness exam is a good idea when getting a chinchilla anyway, not only does it give you peace of mind that the chin is in good health (assuming it is), it also gets your chin listed as a current patient, which is important in case of an emergency.
Oh, that is another thing, make sure you have a vet that treats chinchillas, not all do, as well as at least have the number for an after hours emergency vet that treats chins as well. Just like dogs they have an annoying ability to get sick or hurt in the middle of the night or during the weekend or a holiday when vets are closed.
You don't want to be having to phone all over the place when you need to get the chin to the vet. Do keep in mind too that chins are exotics, so vet bills can easily get very high, personally I advise having a couple thousand dollars in some form in case of emergency, either on a credit card or pet care card (credit card for vet bills), or a savings account.
Anyways, I'm heading off to bed now, I'll be back to check the forum tomorrow.