Binaries for Bitcoin Core version v29.1rc2 are available from: https://bitcoincore.org/bin/bitcoin-core-29.1/test.rc2/
Source code can be found in git under the signed tag https://github.com/bitcoin/bitcoin/tree/v29.1rc2
Preliminary release notes for the release can be found here: https://github.com/bitcoin/bitcoin/blob/027a60d218e7d4e1d50a30cee1188614252f3837/doc/release-notes.md