Hello Tiba73 @tiba73
, quite a comprehensive collection, copied & pasted your Semp + Jov part of the list, dropped it in Excel to get a count, 260 varieties. I have a similar quantity and would be interested in some trades in spring or summer. You listed one that you're looking to replace is S. ciliosum 'f/ Ali Botusch'. It's also in your list of cultivars you have, but I assume you had it and lost it? Anyway, I do have it.
Tip, you can go to a NGA Member's Plant List, sort on a single genera, and show only those I have (I have many more "wants" than "have". Let's see if this Plant List view of just Sempervivum I have works for you. Please note, during the terrible Yo-Yo winter and spring 2020 I had some losses, but haven't updated my NGA list yet. I also have a number of Jovibarba types, including some rare x nixonii cultivars.