Manufacturer of floor panels? Citroen Relay 1996

[Indy500]

I have a 1996 Citroën Relay 2.5 diesel medium chassis type 18 cab with a rusty panel which needs replacing. Having just manufactured a Shogun rear arch out of sheet metal, I don't want to have to do anything like that again. Ever. It's underneath the van and has a small rubber grommet in it. It is drivers side just to the left of the step section. The sill looks fine, so I am hoping to be able to cut this section out and replace it with a new underbody plate/panel. Is there anyone the collective has found that presses these parts, or has them for sale? Or someone who can make one? I can get a photo or two if you need to see where I mean because this body looks like it is shortened and has a Luton type box on the back. Thank you for any help as this will fail the MOT I would think.

[Gibbo2286]

This was my go to place when I was trading.
http://www.middletonpanelsandpaint.co.uk/home/404202

[Indy500]

Thank you for your help! Very much appreciated.