Full credit to @Marsh for giving me the part number he used, but these are working like a charm in every port across two switches for me.
NEW Lot of 10 Nebula L45593-C216-D10 SFP+ 1 Meter l2C Copper Cable Assembly | eBay
Seller accepted $40 for the lot, you might be able to go lower but I was thrilled at $4 a piece.
They have a 3m version too, but I didn't get any so I can't say for sure they work.
NEW Lot of 10 Nebula L45593-C216-D10 SFP+ 1 Meter l2C Copper Cable Assembly | eBay
Seller accepted $40 for the lot, you might be able to go lower but I was thrilled at $4 a piece.
They have a 3m version too, but I didn't get any so I can't say for sure they work.