mc1494 Linear 4 quadrant multiplier and sk9173

[bullsonparade]

Could someone recommend a drop in replacement
for the mc1494. The data sheet can be found at:

https://www.electro-tech-online.com/custompdfs/2004/06/MC1494-DPDF.pdf

I am troublshooting and old instrument and there are 3 of these IC's.
I would like to be able to either get a cheap replacement or quickly
setup a test circuit to check their functionality.

The other chip which there is only 1 of, is the sk9173, for which i can't
find any information.

I'm quite new to the practical aspects of designing and testing analog electronics.

thanks
dM