LM317
Obsolete
The H (Metal Can), J (Ceramic), and K (Metal Can) Packages From Analog Devices Are Now Obsolete
The LT117A Series are 3-terminal positive adjustable voltage...
Datasheet
LM317 on Analog.com
LM308
Obsolete
The H (Metal Can), J (Ceramic), and K (Metal Can) Packages Are Now Obsolete
The LM108 series of precision operational amplifiers are particularly well...
Datasheet
LM308 on Analog.com
When I try to pull up the LM317 ltspice provides LM308.
Thanks
Hi Mthomson,
I cannot also find the LM317 model in the LTspice library.
The ADI website, says that the device is already obsolete.

What I suggest is to look for an alternative in the ADI search engine.
Selection Table for Positive Linear Regulators (LDO) | Parametric Search | Analog Devices