Sublijet compatable cartridges

[DekkaHarris]

Good evening
youve probably come across this a thousand times!!
i have the Ricoh 3100 printer which I've had a year or so. My colours are running low now and
I'm wondering is there any compatible cartridges out there? My cyan has literally just run out!!
i only do one type of mug (post race mugs) and are red and black ink only. As long as the red is red!!
i live in Newcastle and could pick up if there are any shops that sell them.
The originals are a bloody fortune. Just looked and the Cyan is £58 delivered!!! Ouch
Thanks for all your help guys
ian