Reterminating Valhalla RCA to XLR

If Nordost is NOT the one doing it, then the value of your cable goes from $$$$ to slightly over zero after it is done.
So you might try asking Nordost. Otherwise, sell the RCA, and buy some balanced.

Yes, they have done this for me. Pricey, though. But as noted, will preserve resale value and it will be done right.

Neal

Nordost is going to terminate some SPM wire cut with a carpet knife. It is going to cost $400 to fix or a $100 per RCA plug.