You'll likely spend far more time and money
looking for ones that just right. I'd recommend finding a machine shop in your area and have some built. In my own shop, all CNC, we build these types of items all the time. If the ID is .625 I would say the OD is around 1.5. Most shops would take a piece of round stock, slip it in a lathe, true one end, center drill it to fit, cut the shoulders and cut it off. This is a simple project
, don't spend more time trying to source it, just have it made!