That looks comparable to pricing from Thesailwarehouse. Nice thing about them is they already have all sizes for Macs. Didn't buy from them but might be worth while to check them out. Don't know anything about lee sails. Sorry.
morning al.A friend of mine has bought a couple of lee sails through their office in Vancouve B.C. for his Vision 660. Seem to be a decent sail with no worries so far. He bought a 150 a couple of years ago, and a new Jib this year . He seems quite happy with them