2D > 3D Character Model

I am looking for 3D character modeling services to help me create a version of my existing 2D character. I have concept art for the character, so you will be given a reference of what the character will look like, with clarity and detail. I'm aiming for a medium level of detail to create a realistic 3D character that successfully preserves the original 2D artwork. If possible, I would love to see a portfolio of your previous work. Thank you!