Yeah, it wouldn't be difficult to add one if you wanted to. Just make a hole where you want it to go and wire up to an ig itiin or non ignition fuse of an appropriate rating as required.
You can buy piggyback fuses that simply replace an existing fuseholder with 2 fuses and thats probably the easiest, safest and quicket way.
Alternatively, just get an adaptor for the cigar lighter socket.