Power draw guestimated using the Metalbox wave multipliers info and the Real Ring Mod page on Elby desiigns.
http://www.metalbox.com/modules/wavemult.html
https://www.elby-designs.com/webtek/cgs/cgs302/cgs302.htm

• 62 mA +15V
• 62 mA -15V
• ? mA 5V

No info about availability.