I've gone through all the current catalogs for various suppliers. They add and delete seals over time. Reference in the older catalogs sometimes turns up the old sizes but they are NLA so I doubt it would help. Tooling for saws is relatively inexpensive if any volume of seals is t be purchased in that size. Most common type seals like the saws use would be purchased by the 1000 for likely less than 50 cents each making it easy to have any size Homelite wanted easy.
A lot of the old seals were made in the far east even back in the early '70's.
What would really be handy is a list of automotive application seals by auto maker application, by size. Most of the seals we cross reference also have an industrial application as well.
If you would like to check the two out in the old CR catalog,that would be great to see if you can come up with a PN.
Try for 58308 Shaft size, .653" case bore .93"
for 12306 shaft size .624" case bore 1.157"