To set up as a new vendor, please sign up through the sign-up link and download and fill out the Vendor Agreement form, which can be downloaded below. The vendor must download the Vendor Agreement from the attachment tab, fill in the requested information and upload the completed agreement.Please complete and sign the enclosed festival application and contract, please. To work with us, you'll need to first register as a county vendor. Click here to visit the Riverside County Purchasing and Fleet Department. Riverside City College. 4800 Magnolia Ave Riverside,. Become a CPR Certification Provider or Vendor at FC Riverside County Events. Welcome to the FC Riverside County Vendor Signup Page! Applicaons must be submied 30 days prior to a proposed event.