For "glittery" grille cloth, try a jukebox restoration parts house. Jukes of the era were usually flashier than radios and TV's of the time, and meant to attract attention...heck, they even provided their own lighting to make sure you noticed it! I got some white grille cloth that has gold sparkly threads throughout, I think it is also available with silver. And I'm pretty sure red cloth with gold or silver is also available (but I can't imagine a TV with bright red grille cloth!) Try:
http://www.victoryglass.com/
http://www.jukeboxusa.com/
--Bob