Where's That Confounded Echoplex

Well, as it turns out the Echoplex has a bad solid state chip component, and they are particularly hard to find. So I wait, and I wait. I may have to snag a spare parts 'plex offa eBay to make this thing real.

I keep asking myself why I want that Echoplex but it's like a damned biological imperative and doesn't quite make sense.