o2 spacer for skinny sensor?

[servili007]

I just finished up my exhaust, hotshot headers (eventually turbo, but this'll do for now), ebay test pipe, and BRM catback. Now I have the crazy confusing OBD1 1995 240sx, and my second o2 sensor is 3 wire heated (which btw, how the hell does this thing disconnect from the oval connector ) and skinny, just like an sr20 redtop sensor.

All the o2 spacers i find online are "universal", which makes me thing that they're for fat sensors, anyone have any luck finding something that fits the skinny ones?