Adam,

I had the same dilemma as you. I ordered this 1/8" square tubing from Amazon. I cut it in 1/2" lengths and drilled a small hole in one end for the spring, then painted the tube black. On the other end, I inserted a small magnet to mate with the magnet in the switch throw arm. Watch the polarity so they attract rather than repel. The magnets I also ordered from Amazon, but I noticed they don't have them anymore. If you did a search on the name, they might have them by a different vendor.

Products from Amazon:

Plastruct STFS-4 Square Tubing, 1/8", Qty 7, PLS90621 (I paid $7.21)

Tiny Craft Hobby Neodymium Rare Earth Super Magnets 1/8 x 1/16 in. Qty 50 (I paid $3.99)

With the Z-2500 switches is the Atlas spring. That is the one I used. I glued the magnet in to the tubing with a dab of super-glue.

Here are some photos:

Let me know if you need more info.

George (G3)