best place to buy epson pigment ink cartridges

I have an Epson WF-2010W printer which uses DURABrite Ultra ink. (pigment ink).

Ink & Paper - Epson WorkForce WF-2010W - Epson

1 x Genuine T1621 (Black)
1 x Genuine T1622 (Cyan)
1 x Genuine T1623 (Magenta)
1 x Genuine T1624 (Yellow)

The stock cartridges this printer came with won't last forever so I want to find a supplier of compatible pigment ink cartridges, and obviously at a good price.

I could buy empty compatible cartridges and then just buy pigment re-fill ink, and fill the cartridges up myself.

But I think for general easyness I would rather just buy already filled compatible cartridges in bulk and use them.

I'm in the UK. Cobra Inks offer what looks like very good prices, however they fail to reply to my emails so doesn't look like I will buying from them.

Any idea's/suggestions??

Cheers,

Sean.