Ooops ...?
Oh wow...
Well ... congratulations...!
You need at least the whole set of floor panels that are available from K & K and perhaps others. See our vendor's section.
See also the homepage of SLS in Hamburg, Germany (
www.sls-hh.de) for their W113 online parts catalogue where you can find which sheet metal parts and which replacement sections are available and how much they cost.
Floor pans, rockers and rear valance tell me (& others) that there is quite an amount of comprehensive welding necessary on your car.
Hope your 250 was cheap enough to make such an endeavour worthwile.
Good luck & keep us updated
Achim