Here's my tutorial with the material I have at work!...
These are steel wire hanger's.
As you can see it's easily bendable. All bend's were done just by putting in a vice grip and doing it by hand. They already have a round bottom I just pinched it in the table vice to get the point I needed!
And here is the result. Give or take I haven't glued it in yet as I am going to paint it black but nonetheless it came out pretty good.
I used a 1/8 drill bit at first but it was too small so I went up to a 5/32. It's larger than the wire. The only problem I see is even with using good glue I'm going to bend the wire before sliding in a little in order to have some friction resistance along with the glue. Should work pretty good.
Here's the final picture on my new body.
But your pump stroke has to at a perfect point of being able to pull it back with just a couple finger's but still have a spring return to push the pump back up on it' s own. I've almost got mine perfect just a few more problem's to work out. Heck right now I still can grab the chickun wing with my finger's and pump it back and forth (until I got the glue on my guide rod) which still help's when your trying to keep tight in a bunker or shoot off handed!
I just aligned my guide rod's to perfection still no return spring but I can literally take my pinky finger and pull back to cock the marker with it aired up. Give or take with a return spring it would be slightly harder but I'll have that worked out before the weekend is over.