Hey Fred, I’ve gotten a few SACDs from
CD Universe Even if you don’t buy from them I’ve found their reviews useful. Compare the SACD to the CD review to get an idea if it’s worth the upgrade. I found very quickly that SACDs and DVD-As were only worth the upgrade for me if it was re-mastered either to sound better or from stereo to 5.1. I’ve heard a few SACDs (stereo) that didn’t sound any better to my ears than the original CD.
Also if you haven’t already, do a search for SACD reviews and several review sights are available to help you decide which SACDs might be viable upgrades.