A couple online vendors who I trust are:
www.horsepowerfreaks.com - A well known and reliable aftermarket parts vendor. A couple years ago they started offering OEM parts too.
www.siliconeintakes.com - A reliable vendor of silicone hoses, couplers, clamps, pipes, intercoolers... I've bought from them a lot, never had a problem and they're usually less expensive than some of the other well known vendors.
www.toyotaworld.com - Champion Toyota (Dealership) out of Texas) their online parts ordering system has graphics so you can search out parts if you don't have the part number.
I've never used a kit for vacuum hoses so I can't comment on whether it makes the job any easier or not.