Ink converter to fit WH Smith cartridge pen?

[MrsSeanBean]

I can't see an own brand WH Smith converter on their website, but would like to use my trusty WH Smith cartridge pen with bottled ink.

Do any other makes of converter fit them? Not sure if there is a 'universal' fit.

The cartrdiges the pen takes are the small type - see here. I want more exotic colours than black and blue though, hence my quest for the converter.

TIA.

bump

Anyone?

one more try

No idea but you can buy purple, pink and turquoise cartridges for it in WHS.

Thanks advocate, have tracked down some multi-coloured cartridges.