[TYPO3] cannot find 'adodb' in TER

[Bing Du]

Hello,

I'm not able to install ADOdb Interface (rvt_adodb) because it depends 
on 'adodb'.
When I connect to online repository, I can see several extensions depend 
on 'adodb'.  But I'm not able to find any extension that has 'adodb' as 
Extension key.  We use Typo3 3.8.

Thanks in advance,

Bing