[Land-speed] O2 Sensor Bung Extender

[drmayf]

I may have toasted my O2 sensor last time out. It is in a very hot 
exhaust gas location, just after the turbo. I know that Innovate sells 
teh HBX-1 extender and it costs 89 bucks But, are there other off the 
shelf extenders that may be a tad cheaper?  I think I would also like 
one a bit longer than the HBX-1 just for insurance.  I can make one 
also, from a damaged O2 sensor...

Does the length of an extender play much part in the lag time of a 
reading?  Seems to me it would.

Any thoughts, comments etc?

mayf