I was wondering if the port tubes for a set of 4311b's were still available retail through JBL? And isn't there a tube behind either the tweeter or midrange as well? My memory is fading! Anyway, same question as above for that tube also. I have the drivers, am missing ports and need to make some cabinets to get these things in use again. I looked on the web site, but might have missed it as I didn;t see anything. Thanks

Buzz