Where can I find SSL certificates for PayPal Sandbox API servers?

The following SSL certificates are currently valid for PayPal Sandbox servers.
 

Warning: These SSL certificates are for use with legacy implementations ONLY. Do NOT download or install these certificates unless your integration requires an X.509 leaf certificate in your trust store.
 
Endpoint SSL Certificate Encoding Expiration Date
api.sandbox.paypal.com api.sandbox.paypal.com_SHA-2_01132020.pem SHA-256 January 13, 2020
api-3t.sandbox.paypal.com api-3t.sandbox.paypal.com_SHA-2_01142020.pem SHA-256 January 14, 2020
api-aa.sandbox.paypal.com api-aa.sandbox.paypal.com_SHA-2_01142020.pem SHA-256 January 14, 2020
api-aa-3t.sandbox.paypal.com api-aa-3t.sandbox.paypal.com_SHA-2_01142020.pem SHA-256 January 14, 2020
pointofsale.sandbox.paypal.com pointofsale.sandbox.paypal.com_SHA-2_04122019.pem SHA-256 April 12, 2019
svcs.sandbox.paypal.com svcs.sandbox.paypal.com_SHA-2_01122018.pem SHA-256 January 14, 2020
www.sandbox.paypal.com www.sandbox.paypal.com_SHA-2_09292019.pem SHA-256 September 29, 2019

Note: For PayPal Live SSL certificates, see Where can I find SSL certificates for PayPal Live API servers?