Hello BigT, yeah I was hoping someone may have these off a salvaged unit.Good Morning Timothy, welcome to the tractor forum.
Unfortunately, worm gears #1058 and #1063 are no longer available and there are no alternative replacements.
You could try a machine shop, but I suspect it will be cost prohibitive.
BigT -- I did this same job last year, but I got to thinking "those worms are cut in two different directions", so I went back and checked my notes on the work order.....Timothy,
Bob Driver has found 5 ea. new 1058 worm gears on ebay for $30 each. That is a good deal.
My Troy Bilt dealer has no information regarding the worm gear P/N change from 1063 to 2675, however, I read a statement on an internet post confirming that the 2675 replaces the 1063.