We like to camp, mostly with the scouts and the pole ends for a Field Canopy had deteriorated due to UV light and harsh conditions of camping. I couldn't find replacements so I just designed and printed our own. I beefed them up from the original parts to ensure they held up. We'll see how long they last. They work great.
If you need replacement and have a different pole diameter, I don't see why these couldn't be scaled to fit your specific needs.
Measured pole diameter 48.41mm. Pole end max inside diameter 50mm.
The author marked this model as their own original creation.