Peg type ends for rubber tube

[BeeBeads]

Can anyone tell me where I can find the peg-style type of closures for rubber tubing?  They're the ones that push into the tube ends and form a tight closure. 
Thank you! 

[mizgeorge]

I make them in sterling. The biggest selection for base metals would probably be bijoux - https://www.bijouxbeads.co.uk/pvc-tubing/pvc-3mm

[BeeBeads]

Thank you George.