Looking for RCA cables from preamp to amp?

Look up "Prosper Cables" on Etsy. Custom made.

Since this is for home theater use or movies you don’t have to get expensive ones, just good quality budget interconnects would do just fine. 

Maybe I should be more clear about my rational, such that folks do not think that I am endorsing Blue Jeans cables as great sounding cables. I tried a couple pairs and found them to perform roughly the same as OEM cables, just better built. On AVR based systems, it is unlikely expensive cables will provide a noticeable improvement. My experience has been they don’t. You need a certain level of high resolution and low noise floor for good sounding cables to make an impact that is cost effective.

Cables for your/anyone's system is a crapshoot.....you really have to listen to them.    I suggest Mogami,......the most expensive cables are an interesting comparison

I recently purchased a pair of Mogami XLR cables (~$60) a month ago to help with troubleshooting a connection issue.  

They worked fine for troubleshooting, but IMO, they are definitely not for high SQ musical reproduction.  They are going into a box in the garage just in case I need to resolve another issue...