John & Brian,
Just ordered 3 doubles and 6 single opto-relays from the sight John posted, with only $3.00 as a shipping promotional, the entire order cost less than $20.00. A great deal for being able to use my older Lionel higher voltage signals, with the low voltage CC FasTrack switches.
Thanks again John, and you too Brian for starting the thread.
PCRR/Dave