Thanks very much,A few alternatives:
LB MC1022 Stereo L/R RCA Audio Selector Passive Preamp Switcher Splitter Box | eBay
Little Bear MC2 Fully Balanced Passive Preamplifier Pre-Amp XLR RCA Controller K | eBay
Balanced Passive Preamplifier XLR/RCA Volume Controller Audio Adapter/Converter | eBay
Tisbury Audio Mini Passive Preamp II - Pre-Amplifier Switch Box Attenuator | eBay
NVA P20 Passive Pre amplifier. | eBay
NVA P50sa (stepped attenuator) Passive Pre amplifier. | eBay
Bte designs TYPE 1 passive preamp, pre amplifier customizable to your spec | eBay
NVA P50 Passive Pre amplifier. | eBay