Sometimes you get lucky: Original Maxwell PRAM battery from 91 : r/VintageApple
NewerTech® : Batteries : 3V PRAM Battery for Mac®
Apple iMac MacPro Mac mini PRAM Battery – local338
Apple Macintosh 4.5V PRAM Battery 3x AAA Pack For Power Mac, LC and Performa | eBay
200mAh CR2032-LC1 CMOS PRAM Battery Replacement for Sony Playstation 3 PS3 651357760996 | eBay
NewerTech® : Batteries : 3.6V Lithium 1/2 AA PRAM Battery for Mac®
A reminder to remove the PRAM battery from your Mac, or replace it with a new one every few years to prevent this from happening. This was a Macintosh IIvx with its