2.5" IDE to Compact Flash Adaptor
I never knew you could get these! I have an old Elonex IDE based laptop that performs like a very not performing thing this could be the ideal thing to speed it up!. And for £15 an utter bargin!
SUNIX|CF2X2IDE25|ADAPTOR, 2.5" IDE TO 2X CF | CPC
It takes 2x type II (or type I) compact flash cards which means you can get up to about 72GB of fast drive space on there.
What drive type do the old Thinkpad x60 have?