DC socket

Can anyone help me find a supplier for this female 2,55x6,4mm socket?
Thank you.

It's a moulded socket, so won't be available. In-line sockets are also very rare, so you may struggle trying to find a manually usable one at all.

Bear in mind as well, there are numerous different sizes, both outside diameter and pin size.

If it must be a moulded socket then buying a 2.5mm extension cable is probably the best solution.
This is one possible source. There are also other length extension cables available from the same company.

Les