Transcend Storejet 3.5 inch casings are difficult to find in the market now. I don't think 3.5 SATA casings from Transcend are available. Only PATA models and that too they're hard to find. And to be honest, the cheap zippy casings just as well.
Your best best is to get a cheap Advik/Zippy/Gemini SATA to USB 3.5 inch HDD enclosure. e-SATA will be beyond your range so you'll have to use USB to connect the HDD to your friends' laptop.
Edit: I think the Transcend PATA is silver in colour and SATA casing is black in colour. Ooh...btw, remember to open the box and check whether the casing, power adapter and USB cable all are there when you buy. Also check if the power adapter connector fits into the HDD casing. Many times, the adapter will not even match or the USB cable will be missing.