Inspiron 17R SE Power Connector

Can anyone tell me the correct 'technical specification' for the plug that connects the PSU to the back of the Inspiron (and several other models)?      I have now trashed the second PSU - the wire breaks close to where it connects to the laptop - with the result that one of the leads will not connect so although the laptop runs on mains it will not charge.

I am looking to see if I can buy a new solder on connector from Maplins / RS Components etc so that I can fix the lead as the PSU itself is fine and it is clearly a quality issue on the supplied leads.

Thanks.