These just ended on ebay for a B1200? Period correct but don't know about the shape. Would be nice to have.
http://www.ebay.com/itm/NOS-Nissan-Datsun-Bumper-Guard-Over-Riders-B-1200-62675-H1900-Brand-New-in-Boxes-/371725514054?hash=item568c913546%3Ag%3AIMwAAOSwFdtXyLu5&vxp=mtr&nma=true&si=l214VRywdF1gzdl1lzjHUgNtqjQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557