Hey, just wanted to add my two cents to this thread. Not my pictures--I think the ones here are generally better than mine and more thorough anyway *g* (although if anyone wants to see them, I can share)--but I also got to attend the "Art of Babylon 5" event at the Egyptian Theater the weekend after Comic-Con, and got to talk to the costume designer. A couple of things she told me:
1. All of Delenn's fabrics are silk, most of them vintage silks purchased from Beverly Hills Silk & Woolens. This store no longer exists; their remaining stock was purchased by International Silks & Woolens, but according to Anne (I think that was her name?), none of the ones she used are left in that stock. The solid fabric is a silk charmeuse, the others are a mix of brocades and other styles.
2. She frequently used the reverse side of fabrics to give them a more alien look. Delenn's...shoot, I forgot the name of it. The vest/over-tunic thing? Is one of those. It's the reverse side of a brocade.
3. Yep, she definitely used a lot of upholstery fabrics. She and the prop guys actually told a funny story together, where they were designing a new sofa for Londo's quarters and had to scrap it because she'd already used the fabric for one of Vir's vests. (At which point JMS chimed in that he wished they'd told him, they could've kept the sofa and he would've just written it into the show: Londo and friends are bragging about their fashion sense and Vir just looks down at the sofa--which he matches--and sighs. *g*)
Also, this isn't related to the Egyptian event, but the bumpy fabric from G'Kar's gauntlets? Is still available at JoAnn. It's a utility fabric called "Emu Wheat" and it's $29/yard. Also, you can get scarab decorations IDENTICAL to the ones on Londo's coat on Etsy, in silver or gold so there are versions available for both coats.
Apologies in advance if this isn't new information, but I wanted to share it just in case.