I'm always on the lookout for non-branded tools and materials, BRI having enough of my money already. Alexander Art is good for brushes, though many times you can take a Bob Ross or Bill Alexander brush to an art supply store, compare and match them to what's on offer. This is especially true for the smaller brushes. Windsor Newton "Winton" paints seen to be the consensus third-party paint. I haven't tried any Alexander Art paints; some of their non-toxic rhetoric makes me reticent to try them as not being equivalent. Liquid white or black is often made from straight color mixed with linseed oil, at various proposed admixtures. Liquid clear can be replaced with a thin coat of linseed oil, I hear, but I have not tried it. Acrylic primer ("black gesso" which, despite the name, contains no gypsum) are any flat black, usually student-grade, acrylic paint. Primed canvasses abound at any art supply store; not even sure BRI sells them, at least not by mail order. Oversize palettes, sturdy "almighty" easels, and third-party Ross-Alexander-type knives can be found on Amazon for $12. There are a few other things like the brush beater rack or the scrubbing screen that BRI is the only way to go. Shop towels, drop cloth, safety items like fire extinguishers and covered metal pails, are all readily gotten at home improvement stores, of course.