I'm hoping you'll be DIYing yourself a set since you just made yourself an amp
There are quite a few different options out there. Homegrown Audio does make some great stuff; I've used their wire and connectors plenty of times. I also really like Cardas wire when warmth and bass is important, particularly the internally litzed and enameled copper. It has a warmer sound to it than the crisp, clear sound of silver.
I have some details posted about building a pure silver cable
here. In that particular case the wire was sleeved with PTFE / Teflon tubing manually, but if you get it from Homegrown it typically comes in Teflon already, which I suggest if you're going above 2-3 feet. The reason is that there gets to be a lot of friction when you're feeding the silver through the tubing once you're a couple feet in.
There are also some details
here about building a set of interconnects using Cardas wire and RCAs. Cardas wire requires a hot iron to burn off the enamel on the wire and heat up the rhodium-plated RCAs sufficiently, so if you don't have an adjustable solder station, it may not be worth trying.
For a Digital Cable, I really like the
DHLabs Silver Sonic wire. It's solid core silver plated copper in foamed PTFE. Terminated with the Furutech BNC connectors, it's very crisp and detailed. It takes only a few minutes to build.