This is a tough one for sure. I have hit this road block on many occasions. I have taken a small piece of the fabrics with me going out to the LQS or JAF. I thumb through so many quilting magazines that I could go blind from looking and I use our site at
https://www.quilterscache.com/QuiltBlocksGalore.html for other block inspirations. I love to thumb through the different blocks. Bamm! that is where I usually find just the right block and the rest just seems to flow. When it hits me there is no stopping me. The last such inspiration for me was the Depression block and it made a beautiful baby quilt. It will come to you. When it does you will sew night and day to finish this special baby quilt.