These are for sale in the USA by barakandl on Pinside. They cost a little more, but they are tested and come from a far more reliable source. He gives quantity discounts.
https://pinside.com/pinball/forum/topic/fs-mc6821p-mc6802p-pcd5101p-tip102-genuine-parts-great-price
Review:
https://pinside.com/pinball/forum/topic/installing-barakandls-nvram-battery-eliminator-vids-review