Lead for old MacBook Pro from 2008 (Widmer End HP15)

If anyone has the old lead for a very old 15” MacBook Pro from about 2008 I’d be grateful. It’s the sort that has a little square box half way along the lead that changes the alternating current to direct current. It’s a bit faint on the back but I think the old MacBook Pro is model no A1260.
Many thanks Krissie