Have been searching for a free 64bit tonewheel organ. Seems nobody made one, but...... someone compiled the (open source) code for Rumpelrausch AZR3 for 64bit. It's not the best emulation out there but also not bad at all, with build-in leslie and amp emulations.
Download:
https://blog.wavosaur.com/download/AZR3-x64.zip
NOTE: it works without problems in my 64bit reaper install but it crashes Komplete Kontrol here.