Pop top parts advice

Hey all

Anyone know where you can get the plastic strip shown in the pic - it is glued to the metal frame making up the pop top of my 79 Devon Sundowner. Also need to get hold of new popper... any ideas please

 

I got a couple of white plastic square conduit from bnq (what you use to hide electric cable)I used the flat sides and screwed them to the van

 

Also poppers you can buy in Dunelm

 

Thanks John