I got one of these last week for less than $30 plus shipping. It has the Cypress chipset.
http://store.yahoo.com/dealsonic/stpmsismbaus.html
StorTecc PM-350U2-ECS Silver Smart Backup USB 2.0 Dual Fan Aluminum External Enclosure for 3.5 Inch HDD, w/ Tri-Color LED, Retail Box
This is an external enclosure that combines the best of all worlds. First it comes with proprietary patented Ultra Low Noise Dual Ball Bearing Fan, in an aluminum enclosure! It uses the latest Cypress Semiconductor AT2 Chipset that supports up to 300GB HDD. Combine dual fan technology with aluminum construction for the ultimate in external enclosure cooling. High tech Easy Pull-Out Anti-Shock design make this the easiest ever enclosure to install. This is truly one of the best enclosures on the market today!
Key Features:
* Dual Ultra Low Noise Ball Bearing Fans
* Tri Color LED
* All Aluminum Casing w/ Plastic Front End Fan Grill
* Cypress Semiconductor Chipset
* This USB2.0 External Enclosure uses the latest AT2 MicroChip for Mass Storage
* Supports up to 300GB HDD.
* High-Tech Easy Pull-Out Tray w/ Anti-Shock Design
* Proprietary pull-out design make this the easiest enclosure to install
* Operates at high (480-Mbps) or full (12-Mbps) speed
* Supports 48-bit addressing for large hard drives
* Converts IDE drive to USB 2.0 drive.
* Support for MAC OS 9.0 or later and Windows 98SE, ME, 2000 and XP.
* Hot Swappable, Plug & Play features
* Vertical Standing Capability
* On/Off Switch
* One Year Warranty
Package Contents:
* Enclosure with external power supply
* USB 2.0 A-B cable
* AC Power Cord
* Driver CD
* Vertical Stand
* Screw sets for installing storage devices.
Specifications:
* Size: 9.5"(L) x 5.25"(W) x 1.75"(H) (Approximate)
* Power Supply: 100-240V, 50/60HZ, 2A