Consumables for your Citizen dot-matrix printers, such as the following models:

• 120D*, 120D+*, 180e*
• Swift 9*, Swift 9x
• Swift 90*, Swift 90x
• Swift 90e*, Swift 120D*, Swift 120e*
• Swift 24*, Swift 240*, Swift 240+*, Swift 240x
• Swift 330+*, Swift 330x
• ABC*, ABC-24*, 124D*, 224*
• Prodot 300*, Prodot 350*, Prodot 450L, Prodot 810x
• MSP-range, LSP-range, HQP-range
• Prodot 9, Prodot 9x, Prodot 24
• GSX-range (American named versions of the above)

... can be purchased from a wide range of locations, generally from internet-based online supplies companies.

Using a search engine such as Google and entering "Citizen Swift Ribbons" will generally give you a broad range of suppliers.

If your regular supplier cannot provide your requirements for dot matrix ribbons we can recommend SwiftClik Limited.
They are based in the UK but will happily ship worldwide by prior agreement of shipping charges and accept credit card payments online.

* printers marked with the asterisk can all use a standard ribbon designed for the Swift 24 or ABC printer which has a Citizen part number of 3000017.