exh. clamp with o2 bung on it

I saw on horspowerTV last weekend one of those 3+in wide exh. clamps with an o2 bung attached. I have seen the regular clamps without the bung and cannot find the ones with a bung. Does anyone know were to get them?

I could order one and have the bung welded on but would like to check out the cost of one already with.

My idea is cut 2 holes into the h pipe on each side. Put a clamp with no bung on the side not used and the one with the o2 on the bank you want to check with a W/B. I think it would be easier to swap the clamp from the stock and o/r H than hauling my o/r and stocker to a shop seperatly to get a total of 4 bungs welded on.

anyone???

Thanks for the link. Price is not bad if you figure it would prob. be 25$ at least to get a bung welded on at a shop and that the regular SS clamps are 14$.

The new clamp design is so much better than the small U bolt and plate as it spreads the load and seems to really clamp well without seriously distorting the pipes.