Certified GKH Gardening Expert
You can! Hibiscus propagate easily from seed. I can only recommend looking to your local garden center, or online. There are many places online that can send you just about any seed to anyone. Just do a search, and find the best option for you.
Here is an article with some information: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-propagation.htm