Agreement on the Hammond thing. If you know a Hammond guy he probably has a bunch of tanks kicking around for free. I’ll see if I have one..
you can still find Space Echos for reasonable prices. get an RE-201 and enjoy both a lovely spring reverb and a classic tape delay! i still see these go for around $500 commonly, which is entirely worth it. i run my Voyager (and pretty much everything else) through the Space Echo all the time, it sounds great.
i also have an old Vesta Fire RV-1 spring reverb, and it sounds pretty nice too. should be pretty easy to find for a reasonable rice as well.
The Furman Spring Reverbs are overlooked and under-rated. Grab one.