cheers olber, i will source that at big and quicks at next visit, suprising how much useful strip steel & angle they have for a commercial store.
The angle there now will not be the edge for the lip seal although, i'm going to make a piece that sits up the front in the origonal position, from some thin 10x10x 2 angle sitting upright, depcited green here;
under that thin angle i will reinforce it with some normal flat bar depicted purple, then i will make two small fixing ears and weld them in, depcited red. (or i could make it bolt in)
perhaps you could tell me, is there a need, if i made that seal bar back to origonal position.. to remove it later? does it get in the way of anything?
otherwise i'll just put the seal strip in and leave it there welded for good, remember , the only reason i removed it is because i cut the rear bulkhead out for access and room! and had to knock back the bulk head on the left... for clearence of the tps i think.
either way, i am going to put a fitted piece of insulating foam etc above the purple area up to both angles so it seals my boot in.