The instructions for making the Olympian (and the bushing info) are on the PSI website:
https://www.pennstateind.com/library/PKOL2xx_ins.pdf
The Woodcraft American Click may be an obsolete pen kit, but have a look at these instructions and see if they are what you need:
https://www.woodcraft.com/media/W1s...click-ball-point-pen.pdf?sha=ec791c65929c59c5
The "combo pen/pencil version 2" product number "2423A27" does not look at all familiar. . The product number looks ALMOST like a Woodcraft number, being 6 characters, but they don't use letters in their numbers as far as I know.
I have never seen a "combo pen/pencil" kit in my pen making experience. There are some kits that can be made to be either a pen or a pencil but I have not seen any kit that can function as a "combo".
Here is a listing of where to find instructions (which I got by going to the Home page of this website ... see right hand column at Home)
http://content.penturners.org/library/man/suppliers_kit_instructions.pdf
and here are some links to pen kit bushing and brass tube information ... also Home page ... right hand column
http://www.penturners.org/forum/f109/bushing-tube-dimensions-kit-suppliers-135922/#post1805105
I also have a years-old chart that is useful for some obsolete kits. . Many of the kits are still being manufactured and sold.
You may find it useful. If you send me your email address I will send you this chart (which I use myself very often).
I don't think this chart is generally available anymore except by getting it from a long-time IAP member.
This chart includes the original (I think) Olympian Elite as well as the Olympian Elite II. There seems to be one dimension different.
I do not know if there ever was a pen kit called the Olympian without the word Elite, as in your original post.