On 4/11/19 5:53 am, Winfield Hill wrote:
Jim Horton wrote...

Interesting that there weren't more responses.

I'm a big user of eBay and AliExpress, and purchase lots of
high-current and high-voltage stuff, to supplement my pile
of unusual parts, but I'd not come across the items you found.

An AliExpress search for "Flyback Driver Circuit" comes up with the same
item in the top few hits: https://www.aliexpress.com/item/32769816552.html