Where can I find a SATA to IDE converter

[DJM1972]

I bought a eGo portable USB Hard drive and wanted to install a OS and boot from it. But I couldn't because my pc is too old I guess. I have a hp pc and I posted in the HP forums but was hoping for more info on these adapters.
Here's the post from hp:

Re: Can't install OS on my portable USB Hard drive? - HP Support Forum

Thanks.

 

[Dngrsone]

Look here.

 

[JCB1]

you can also try www.dealextreme.com expect shipping times to take 2-3 weeks, but the price will be cheap