Internal RAID controller with 2.5" disks ?

Hi there,

Ages and ages ago I saw a hardware RAID product that fitted in a 5.25"
drive bay and used 2.5" hard disks.

Does anyone here with a better memory than me know who makes such a
product ?

I basically want to make use of fast and quiet notebook drives and
stripe them for performance on my desktop PC .. want speed and silence
which isn't the easiest to have together :-)

Also are there any good IDE controllers about with a good lump of
cache on them ?

Thanks.

Mark