Boy, I have a Panther tent, 2 actually (wedge & wall) and I have no idea who I'd go to now, but before I'd source a new vendor, I'd decide what type of tent I'd want and then go from there. Some might be better at a certain style that others, ya' know?
The loss of Panther will be a BIG hit to the reenacing and MZL'ding community, as their catalog was FULL of great items, besides tents and camp stuff. I've attached their catalog here for you - in case you didn't have it - take a look. Notice the key build details that they put into their tent designs. Maybe that will help you decide whom is best for your next tent purchase. Good luck!