The bumpers are original MG TD style.
If you just need the face bars and overriders:
Moss Motors has the chrome for $123.95 each (front& rear).
Overriders are $36.95 for a set of four.
http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexI D=32854
If you need everything, Moss has the full kits listed near the top of the page (bumpers, overriders, mounts, bolts etc)
Paul Mossberg
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster
If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)