Edelbrock 5777 spring alternatives

Hello,
Does anyone have a recommendation for Edelbrock's 5777 springs? They seem to be discontinued.

https://www.jegs.com/i/Edelbrock/350/5777/10002/-1
Jeg's alternative is a dual spring which the 7177 cam manuals says not to use.
https://edelbrock-instructions-v1.s3.amazonaws.com/edelbrock/7177.pdf
thanks