The strip between the wooden floor in the lounge and the tiled floor in the kitchen died, largely through old age and bad installation from the previous owners. When I tried to replace it I realised the problem of finding exactly the right profile for the gap. The closest thing I found took 3 days to arrive, cost a fortune and was totally wrong when it finally arrived.
Stacking up a zillion pieces of 6mm laser ply is never fun but I actually whizzed through it in an hour because I squared them up against an angled piece of aluminium I had lying around. The whole thing was skinned with flexible 0.8mm Birch ply. In one evening I have exactly the right piece required to span the gap, nearly 2 months later it's holding up really well (a little grubby because I forgot to varnish it). I just need to lift it again now and finish it off properly.