Quadrature Decoder/Counter Interface ICs

I have been looking for Quadrature Decoder/Counter Interface ICs as HP's HCTL-2016. Digi-Key is not selling them. Another option is LS7366 Quadrature
Decoder/Counter Chip. I can't find this either.
I was wondering why this is the case. Are there other options that I did not find?

Unobtanium ?

Hi Allan,

Farnell seems to have the HCTL-2016

https://uk.farnell.com/jsp/search/b...arch_001&Ntt=HCTL-2016&Ntx=&_requestid=175077

on1aag.

https://www.lsicsi.com/ makes a bunch

Thanks for the links.
At Farnell they are out of stock.
I found a UK destributer for lsicsi - thanks dknguyen.