Beautiful flower found in south Florida..

Would love to know what kind of a flower this is, and possibly where I could get some. Thanks for all of your help!

Lol. Welcome here.
That's a Hibiscus There are lots of colors available.

is there a place online I could purchase these??

hmmm.... i really don't know. Never bought flowers online. Lol.
just ask some gardeners you know. They might get you a little plant. Its better.

Yeah, You might want to have a look on
http://www.flowersforums.com/do-you-know-its-name- 80279.html
You'll see the pink version of Hibiscus + some reference too.

would any be in the area of Michigan this time of year? I thought I read they winter well?

Hibiscus. You live in Michigan. Depending on the hibiscus, most are not winter hardy for you. However there are a few varieties that are. The one you show is a tropical hibiscus and it is one you would keep in a pot and it would live at a bight window or greenhouse over the winter. If your favorite trusted nursery doesn't have any in their greenhouse, you can ask them when they will get them in.

As for the hardy ones, the Rose of Sharron is your typical winter hardy hibiscus. It is hardy to zone 4 and gets to be a nice 10'x10' shrub. This one comes in pink, white, blue and a variety of those shades. It also comes in single and double flowers. There is also a herbaceous hibiscus that is also hardy to zone 4. It gets huge 10" flowers in late summer and gets an easy 5'x5' bush but it dies back to the ground at frost. The flowers come in deep red, white and pink but I've never seen blends on this plant.

If you are good with house plants, get a tropical hibiscus. They are absolutely stunning.

Google tropical hibiscus for merchants. I will not verify any merchant on line since I've never bought a tropical hibiscus.

Hibiscus is also a primary ingredient in many herbal teas.