I have used Memorex discs for many years. It's the same quality as always. These discs come uncased (the discs are just on an open spindle) but I kept an old Memorex case to put the discs in.
PlexDisc DVD-R 4.7GB 16x Recordable Media Disc - 100 Disc Spindle: Reliable and High-Quality Data Storage Solution
11 Review
Sony 50DMR47SP DVD R 4 7GB Recordable
10 Review
High-Quality Philips 16X DVD+R Media 50 Pack π - White Inkjet Printable - Versatile Cake Box Packaging (DR4I6B50F/17)
10 Review
π Smartbuy 700MB/80min CD-R Blank Data Recordable Media Discs - Pack of 100, 52x Speed, White Top
10 Review