A couple more good options at Mouser Electronics (my favorite source for parts):
Lowest price, exact oem specs.:
https://www.mouser.com/ProductDetail/KEMET/ALS70A303DA025?qs=sGAEpiMZZMtZ1n0r9vR22YqjN7vGN3ZSFC7Ixb34xzWK9fCV4GllLQ%3D%3D
More expensive, but known to be high-quality (and in production at least 40 years):
https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/CGS303U030V4C?qs=sGAEpiMZZMtZ1n0r9vR22bNos12dWCDWPsAPy5duZ7Q%3D