My partner and i are looking to try a new metal spiked chastity cage. It has to have 1 or 2 layers of spikes at the base and be closed off, kind of like kali teeth with a closed off cage. Wondered if there's any company that makes this or any way to get this desired cage. Thank you.
Some of Red Chili's cages have the option of punishment pins, not exactly what you are looking for. You may have to ask some of the custom makers if what you want is possible.
This one is not metal but it seems to meet your other requirements. I have one and it's reasonably comfortable ... as long as you keep your penis completely limp! ;-) https://www.aliexpress.us/item/3256805969945321.html It's also available from some ebay sellers, such as : https://www.ebay.com/itm/364381677323