I think it does exist. Check out
www.pcclub.com . Ive gone there for years now. They have external enclosrues of i remember correctly, and aslong as they still do, which im pretty sure they do, they most likely do have the USB kind.
EDIT:
Here you go!
http://www.pcclub.com/product_detail...temno=A3312296
EDIT: actually **** thats IDE
EDIT:
http://www.pcclub.com/product_detail...temno=A3326328
There ya go.
$59.99
ATHENA 3.5" SATA-SATA+COMBO ENCLOSURE
Model :EB-2318SU2S
Interface: SATA to (USB2.0+SATA) Combo
With 8 x 8cm turbo super cooling fan
For 3.5" SATA HDD, Cable less connection
Support SATA-I, II
High Speed :USB2.0 upto 480 Mbps
SATA upto 150MB & 300MB
Power adapter: 100~240V/12V- 2.0A
OS :Windows Win98se/ME/2000/XP,
Mac 9.0 & higher