Oxygen cylinder for a mini 'welding' torch?

Not sure where to ask this so thought I'd start here .........

Note: I'm in the UK

My father is a jeweller and has had a kind of mini welding torch for
some years for doing very fine welding work on jewellery (the torch is
a 'Micro-Torch' by Formadent, France).

He has though just found out that he can no longer get hold of new
oxygen cylinders from his usual supplier.

The oxygen cylinders he currently has are labelled:

Prodont-Holliger SA
06140 VENCE FRANCE

and have a brass screw thread

they are 74mm in diameter and 265mm in length

I've done a search on the 'net but can't find anything, not even the
company referred to.

As an alternative, can he get the existing cylinders refilled?

The welding torch uses two oxygen cylinders and one gas cylinder (the
latter is much smaller than the former and has Miniflam written on
it).

Any thoughts or ideas please?


Ta,
Phil

To avoid Spam I've not used my real email address in the header, so if
replying via email, please send to:

phil at morris0 dot fsnet dot co dot uk