I don't need half unit for basal, I take 7 basal in the morning and 10 at night, 1 more or less does not matter much.
But I really do need it for bolus, my bolus is 2.5 to 4, there is one pen with half doses that have just been available where I live but I have not managed to get it yet.
What I did after asking for help from DN and Doctor and pharmacy and getting no help was to get 'normal' insulin syringes and use them to 'suck' out the bolus doses for my apidra pen. Now I can give half units and even a bit less. I use this method at home only and Im stuck with full units when Im out. But since I eat more dinners at home and all breakfasts I can adjust most doses like this, and it helps a lot!
I also uses much less insulin since I don't need to 'prime' the pen, and the 2 (or 3) wasted doses per injection is a lot when you take 3 units for a normal dose and adjust once with maybe 1 units, that is 4(3+1) units used instead of 10(3+3 +3+1).