Hello
If your looking for some known working chips i got lucky with this Aliexpress supplier
https://www.aliexpress.com/store/product/1PCS-UDN6118A-UDN6118-DIP-18/1157182_32829933423.html?spm=2114.12010615.0.0.7410570cOpCtwU
ten for £3.10 and everyone worked fine in a Gottlieb sys80 display
Cheers Bob