To the moms out there! I need help with maternity support belts and where to go for them?

My OB told me to invest in a maternity support belt because of all the pressure in my lower half. My baby is causing me to have pelvic bone separations and a few other issues. I am on my 2nd pregnancy in my third trimester and I have never needed one before till now. If any moms out there who have needed and used one before I need suggestions where to look online or stores. I have a few friends who have needed them and didn't like them cause they were uncomfortable. I just need some options. thank you