Skull, maybe try grip training and stretching? I've just had a week off and that's what I've been doing to keep myself occupied.
I have the same trouble Shifty. I find if I put a mirror in front of me, at quite an angle mind, then do wide grip pull ups while leaning back a fair bit I get most lat activation. Without a mirror it's like a completely different exercise, actually seeing your lats contracting makes it sooo much easier. With rows, no matter what type, I find it hard to isolate my lats and my biceps end up dominating. Have you tried exhausting your biceps first so your lats are forced into action?