Nope...just retailers/distributors
Coincidentally, right after I saw your post I had a call from someone who'd bought a Kracor tank from Ocean Link. I just went to their website...if you check their tank drawings against the Ronco Plastics catalog (link below), you'll see they're identical. They install systems as well as just sell equipment...they apparently buy their tanks as "blanks" (without any fittings installed) and spin-weld 'em in themselves, which allows 'em to keep the most common shapes/sizes in inventory. If they're local to you, their ability to spin-weld could come in handy if you need to add a fitting or need one in another location. Ronco will install fittings in the sizes and locations you specify when they make your tank. So if Ocean Link isn't local to you, I'd compare their prices with Ronco's (Kracor doesn't sell direct) and go with the best price...you'll end up with the same tank.