i talked a guy on ebay selling billet sets for banshees, to sell me just one, pricey though...$35, but the pipe side was too small for it, silencer side was good, i unscrewd the locking ring, and used a high temp silicon coupling from a turbo intercooler, i have one for my carb to cfm tube, and had an extra smaller one
cut that and wrapped it around, then re-installed the compression ring and tightened, worked like a champ
the silicon boots are available at.... siliconintakes.com
they may have 1" ones that would just slip on and clamp???