Here is one potential way to approach this:
Have wife simply date potential partners independently.
Have "happy to socialize with husband, with potential to cohabitate" one of her compatibility markers.
If people wife meets aren't of the same mindset, write them off as incompatible. Decide ahead of time if immediate friendship with husband is a compatibility marker.
Realise that these can be unusual friendships and may take time to grow. Enable that by having husband spend some social time with potential partner without wife to find other areas of commonality.
Be kind to everyone you two put through this process.