On Semiconductor LM317LBD has the following suffix callouts. Per the datasheet below.
D SUFFIX SOIC−8 Surface mount CASE 751
Z SUFFIX TO−92 Through hole CASE 29
G calls out Pb-Free.
R2 callout 2500 Tape/Reel
Active part numbers , LM317LDR2G
Orderable part numbers on page 9 of data sheet , https://www.onsemi.com/pub/Collateral/LM317L-D.PDF