The easy answer is “it depends”.
I would check prices for both options and just do the cheapest.
Moss Motors also has them, part #454-010. But they are pricey at $49.95 each! Yikes!
They are made VERY well though (see http://www.mossmotors.com/graphics/products/PDF/454-010.pdf)
In either case, you also want to replace the rubber strips between the overriders and the bumpers. Moss Motors part #400-418, only $5.75 for the set of eight.
The Moss parts are here:
http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexI D=32854
I am SURE MG Magic is cheaper. I’ve no idea what rechroming will cost.
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)