yeah, I found some kind of plastic plug just laying around on the floor in my house that fit that "handle" hole, I think it may have been packaging from one of my kid's toys we had just opened, you know, the packaging that takes an army to undo? lol! iI'll probably look for that plug from Lowe's, though, since it is black and the one I put in is translucent white plastic...
I was going to get one of those axlebacks from PrecisionMuffler.com they make for the xD, since theirs was a lot cheaper than the TRD ($270 vs. $450), and they used a Magnaflow can... but then I found a TRD listed on Ebay for $219 starting price, and no one else bid on it, so I got it for the $219 plus Free Shipping! And the TRD is pretty polished stainless steel, the precisionmuffler one was not... so, what the hey, I ended up with a really cheap and really shiny TRD axleback instead!