They estimated that the fix-it cost would be between $400 and $500, but that I could likely fix it (for virtually zip) by taking it apart myself and just drilling a few holes and refasten the ends of the broken arms with self-tapping stainless steel screws. They were partially correct, as these two images try to show...
... so, in other words, there are no "welds" in my case, rather, the ends of the shaft spider arms bolt to the rim of the stainless steel tub; and, the breakage occurred within three inches, or so, out from the shaft (not at the ends of the arms).
My problem now is that I can not seem to find the part I need -- and the only solution appears to be buying the entire stainless steel inner tub with the shaft/spider arms welded onto it as a single unit, or "part"... so my question is "Does anyone here know where I can buy JUST the bolt-on shaft and spider arm that I need" ???
Thanks for your time.