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I got this one and was really pleased. You do need to do a little deburring with the included abrasive, but it was comfortable once finished. It's my first cage.
Most comfortable one I’ve worn. You’ll need to sand it though with some fine sand paper to remove any sharp edges. Also soaking it in boiling/ hot water first to soften it up since sometimes they arrive malformed(careful it will be hot but once it looks correct use cold water to harden it again. It might come with some sandpaper though I don’t remember. Amazon
Something like this.
Best one I’ve managed to find.
FYJENNICC New HT-V4 Chastity Device Cage Male Briefs Men's Underwear 5Rings (Pink, Nano) https://www.amazon.com/dp/B08HXWKQ59/ref=cm_sw_r_cp_api_glt_fabc_4TP9PGPB8X07H46662SJ?_encoding=UTF8&psc=1