We carry Seamless White Projection Cycs made of IFR muslin fabric.  They come with grommet tie tops.   We carry several sizes to meet your needs:
 
30'W x 12'H
40'W x 25'H
77'W x 24'6"H
89'W x 24'6"H (this option has a door opening in the middle for stage access)
 
These cycs can be hung from truss.  To make the surface even more tight, the cyc can be used with a a stretcher.  Ask about our stretchers available for rent.