Of course there are loads of adaptors out there, but I'm after one which specifically makes it a 3.5" drive with the SATA and power connectors lining up with those of a 3.5" drive so I can put them in hot swap bays designed for 3.5" disks.
I've only seen one or two around, but they tend to be pricey, well over £10 each which seems expensive.
I might try to convince my mate to make them for me with his 3D printer as it's an easy design to knock up. But if anyone knows a place to get them cheaply, please let me know.
Cheers