OK--I plan to do almost exactly what jvh22a has done.
Start with a flange from
http://www.turbo-performance.com/ ($25  
I've ordered my 90 deg, sch 40 weld-els (4 for $20 from mcmaster)
I'll cut out a T3 flange and viola! My new toy (TIG welder
<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='
'> ) should come in handy!