You also, as living stones, are built up as a spiritual house, to be a holy priesthood, to offer up spiritual sacrifices, acceptable to God through Jesus Christ.
(c) Our repentance is our sacrifice.  "Take with you words, and turn to the Lord; and say unto him, take away all iniquity, and receive us graciously; and so will we render the calves of our lips" (Hosea 14:2).  It is safe to assume that if repentance, even under the old covenant, was a "sacrifice," so it still is.