I purchased a header accessory kit from DC Sports after buying a used DC
Sports header. The kit came with gaskets and the O2 extension cable.
Call them directly, you might want to try the manufacturer of your header
too.

In article <pY3ib.58224$AH4.39020@lakeread06>, amsjsj wrote:
> I have a 1996 Honda Accord LX, I got some OBX RACING headers installed and
> now my 02sensor does not reach. I heard there is an O2 sensor extension.
> Where can I find an O2 Sensor extension? I tried all performance shops and
> pep boys and napa and places like that. The only luck I found is the make
> the extention for Ford and gm. But i can not find one for honda. One
> performance shop told me DC Sports carrys them is this true?
>
>