APH offers templates for producing tactile graphics in numerous fields including science. New graphics are added regularly and the user can sign up easily for a free account.
From the APH site:
Finding tactile graphics templates is now easier than ever!
APH’s Tactile Graphic Image Library (TGIL) contains a pool of well-designed templates to aid with the creation of tactile graphics. TGIL 2.0 features improvements that make the website more accessible and more intuitive. Also, we have added a forum for tactile graphic discussions to aid in your design and production needs. All you need to do is register to begin using the free Image Library to find tactile graphic templates that can be enhanced for your needs.