https://www.equip-bid.com/auction/2235/item/1737 (not affiliated with this sale or website, just putting it)
I think these are KG-4.2 (edited per Opusk's & jjptkd's comments - Thanks!), along with some other bookshelfs and a center. I can re-edit this post if someone is better at identifying. This is an auction style website through various vendors. I've purchased different things off of there before without problems. If you're interested, biggest thing to keep I mind is the scheduled pick up dates, which are firm. Also, unlike e-bay, you can't come in at the last second and snipe the items, I think it resets to 5 minutes if you're within the last 3 minutes of the auction.