Betas

Industry and company betas may be obtained from aggregators like Bloomberg and Kroll. You can also calculate betas using historical pricing information for the subject company or somewhat comparable publicly listed companies.

See here for beta calculation guidance. Beta Formula: How to Calculate the Beta of a Stock (investopedia.com)

Current industry betas

Prof. Aswath Damodaran has also done the heavy lifting, and has made current industry betas available for free on his website: Betas (nyu.edu)