You can my friend but you are looking at a fair wad of cash, paint them yourslef on a nice boring sunday afternoon, takes about 2-3 hours to do the lot properly. leave them to dry for 24 hours before driving the car though, otherwise crap will get stuck in the drying paint.
as i found the hard way if its below about 15 degrees c just dont even try you will bugger it up unless you can leave your car for about 2 days without moving it
best time is around June when the air temp rises to atleast 15 then the paint will dry alot better and the end result will be alot better than doing it now.. unless you have access to a garage with a temp of 15c +
Wait so you cant be arsed to paint your calipers so you want to buy a completely new set and fit them? pmsl thats more work than just painting them ffs!