They may be the only homebrewing conicals with stainless jackets but Ive been using soft jackets on my stainless conicals for years.. along with silicone heating strips
BTW these conicals are available direct from china on places like alibaba from different manufacturers and resellers besides the ones mentioned above. others including myself have purchased them this way..
Do you happen to have a link. I have looked and haven’t found them. My order has been in since early summer and the delays are getting old.