Seen Harris several times, most notably in the 2013 Scottish Cup semi-final against Falkirk when he helped turn a 3-0 half-time deficit (cue Hits shirts thrown on the pitch in disgust and fans walking out) to a 4-3 win after extra time. He had a bad injury shortly afterwards, missed the best part of a season and then went out on loan to various clubs without ever really setting things light. On his day he's exciting, tricky and pacy. Whether the injury has taken its toll, who knows. Might well be worth a punt though.
Someone I would definitely be looking at is Craig McGuffie of Ayr. Only 19, he broke into the first team towards the back end of Ayr's disastrous season - if McCall had had the balls to play him earlier I'm certain he would have kept them up. Best suited to the 10 role he's creative, exciting and has an eye for goal - as evidenced here:
https://www.youtube.com/watch?v=2-i7dA0O1j0