is it a hose, or just a cover type thing blocking that off? either way, most auto parts stores should be able to sell you vacuum line or hose by the foot..
Its the hose off the end of the hard line but it goes from small to much larger and they had nothing like that.
1998 GS with Open cone, PLOG, ZZP Catless DP, tune & Intense MPS 3.6. Pulls good enough to make the woman smack me and call me a D!*k.