Vacuum bag "seal/closer" in UK?

[Cozzer]

Trying to find similar in the UK, but no joy...

You get the idea - the bag's open end is placed over the blue C channel, and the white bar is then forced down into it, hopefully making an air-tight seal. (If it works, a lot easier than the sticky mess that "reusable" sealants leave)
I've thought of plumbing pipes, conduit, even wall-board trim, but it's a case of "matching" the external diameter of the white against the internal of the blue!

Ideas and suggestions welcome, please!

 

[HOJ]

Like what I've got on mine: Bag closer

 

[ChaiLatte]

The same thing is used on the resin for filling electrical cable joints, to keep the two parts separate until you want to mix them.

 

[Cozzer]

Like what I've got on mine: Bag closer

Yes! Just like yours!

Thanks, HOJ....why my google searches didn't find that site is beyond me!

 

[Cabinetman]

Or you could use a nice tight tongue and groove on two bits of hardwood, couple of G cramps needed.
Ian