That is a very old and obsolete AMD electronic chip. But I found this at Ebay: https://www.ebay.com/itm/1-Piece-NSC-GEODE-SC3200-SC3200UFH-266-BGA-Chip-With-Balls-/400405814608
Also at Ebay for AMD SC1200 : https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=amd+sc1200&_sacat=0
Warning Not sure how reputable these sellers are. But the first Seller of the SC3200 has a very good ratings.
EDIT: MISREAD YOUR QUESTION. You are looking for a motherboard that uses the SC1200/3200 AMD Processor and not just the AMD processor.
The only company that I found that might still have SC1200 Boards is Kontron: https://www.kontron.com/en/products/x-board-r-861-/p86768
The board is called a X-Board with a SC1200 processor on it.
I would contact them and find out if they still sell those boards or they might be able to direct you to someone that still sells those legacy boards.
