dont think you can try to source a replacement
exactly at what point did your car stop boosting before or after the 249 bypass? if after try putting all back to oem does it smoke bad when you put your foot down this is a tell tale sign that your lambda is fcukd remember there are 2 lambda`s pre cat and after cat the pre cat is the most probable one that fails its located on the downpipe from the manifold easy to get at as well
exactly at what point did your car stop boosting before or after the 249 bypass? if after try putting all back to oem does it smoke bad when you put your foot down this is a tell tale sign that your lambda is fcukd remember there are 2 lambda`s pre cat and after cat the pre cat is the most probable one that fails its located on the downpipe from the manifold easy to get at as well