After the Bombardier CRJ-100 and CRJ-200, Big Planes Kits is to release 1/144th and 1/72nd Bombardier CRJ-700 kits.
Sources:
http://bigplaneskits.com/during-the-bombardier-crj-700-1144-172-big-planes-kits/
http://bigplaneskits.com/during-the-bombardier-crj-700-1144-172-big-planes-kits-part-2/
V.P.