Thanks for the posts.
Thomas H-I like this bumper from CRC. This one and the BSR are not quite wide enough for 235 but they will protect the chassis well. The CRC bumper is not as tall and may fit the bodies like the Peugeot 905 B a little better in the front. The foam on the CRC is quite a bit stiffer than the BSR foam; I like this better.
http://teamcrc.com/crc/modules.php?name=Shopping_Cart&file=product&c_op=v iewprod&prodID=7719030
Here is a pic with my latest installation. I have used 5 short aluminum posts to support the bumper and keep it in front of the graphite bumper. This has been working well and looks nicer than my previous install. I install the bumper over the posts and then install body post and screws to hold the bumper down. It is important to mechanically hold the foam down in some manner. Yes that RF needed some more negative camber;done.