Available adapter to use 340 air cleaner on Carter BBD?

It seems everything is plastic and reviews report cracking, deforming, melting, etc. I guess I will have one made (metal, aluminum). Thanks anyway.
You would think with all the bad reviews at least one person would step up to the plate and market a simple metal "copy" of the plastic item. Weird world we are living in, walk on the moon in 1969 and now, in 2017, nothing on the market but communist made junk.