Try this link:
https://www.golfworks.com/oem-shaft-replacement-guide/a/376/
Select Ping, once it loads, search for alta cb
I believe it comes up with 2D3S and/or 2D3M. Depends on your tip diameter (335 or 370).
Search for those codes on the golfworks website. Should come up with a lot of selections.
easier link: https://www.golfworks.com/images/art/Ping.pdf
do a search on 2D3S and 2D3M
2D3S is for Fairway Shafts (Wood Shafts)
2D3M for Hybrid Shafts (or Iron shaft in some cases).
ping shafts are Alta CB Sr shafts