OK, I know you're sorted for jumpers now Pruni, but I must just mention a couple of unisex tops I got recently from Cotton Traders which are lovely (I am long all over, so need long tops like you, but am fair and pink so my colours might not be yours!) Anyway:
easy shirt
washed button-neck sweat (I have the duck-egg one)
Home page is here - worth a look (unisex things great for length as a rule, I live in men's clothes )