max1zzz said:

The Sata cards are mac specific, but you can team a £5 PC Sil 3112 card with a £1 flash chip and flash the mac firmware onto the card to get a mac compatible sata card on the cheap

Click to expand...

Found this on Amazon UK. This look right to you?
http://www.amazon.co.uk/gp/aw/d/B00O615S60/ref=mp_s_a_1_1?qid=1426202741&sr=8-1&pi=AC_SX200_QL40&keywords=sil3112&dpPl=1&dpID=41pjmPUdX1L&ref=plSrch

I nearly went for this one, but canceled the order as I didn't know if it was flashable:

http://www.amazon.co.uk/gp/aw/d/B00NNR0C6E/ref=mp_s_a_1_2?qid=1426203014&sr=8-2&pi=AC_SY200_QL40&keywords=PCI+sata&dpPl=1&dpID=51a%2BPisfgUL&ref=plSrch

How would I go about searching for an appropriate flash chip and indeed get the software needed to flash the card?