408 bumpers and front valance

[Sterly]

Hi. I've started working on a 408 and am trying to work out if there should be some sort of valance visible below the front bumper. I've included a pic with the bumper removed.

Also, front and back (badly dented) bumpers are in a very poor state - in fact the front must have been a back bumper at some point as it's got towbar holes drilled in it and it's been cut, shut and had bits welded in etc. Were the bumpers proprietary Bristol or were they from another car? Does anyone have any ideas on replacement availabilty? The bumper on the front seems identical to the back bumper but inverted!
Hope someone can help
Thanks
Mark