Commercially available sunflowers have maturity times ranging from 60
days up to 100 days. Look for some of the shorter ones in any good seed
catalog. There must be a few thousand varieties to choose from. Many
hybrids, some pollenless (if you want them as cut flowers [but don't use
this kind for seed or oil]). Prices are also all over the map.
Sunflowers for bird seed (which will grow if you plant them, but the
maturity time is indeterminate) are in the $5-15/50 lb range. Some of
the hybrids get up to $70/oz.

I'd say you have a reasonable chance of getting seed heads from
birdseed, but a better chance with some of the decorative sunflowers
from a catalog if you choose the shorter maturity time.