What commercially available options are there for a beefier mount than the stock rear rack?
Specifically: a rear rack the does not use, or attach to, the plastic rack that comes with the TR650s.
Option 1 - OEM from Husqvarna, which I do not believe anyone has obtained yet, this information came from a file called "my13Husq_aftersales.pdf" on Husqvarna-motorcyclesNA site:
Husqvarna PN: 85396Ø2 - Givi TRK46N (20.7” x 16.1” x 12.2” external(?) dimensions) and Husqvarna OEM rack.

Or to get a beefier rear rack that seems to be available with the panniers.
Husqvarna PN: 8539598

Or the beefier rear rack seems to be available with the"Weekender" kit.
Husqvarna PN: 8539668

Or the Beefier rear rack seems to be available for the "Commuter" kit.
Husqvarna PN: 8539669

Specifically: a rear rack the does not use, or attach to, the plastic rack that comes with the TR650s.
Option 1 - OEM from Husqvarna, which I do not believe anyone has obtained yet, this information came from a file called "my13Husq_aftersales.pdf" on Husqvarna-motorcyclesNA site:
Husqvarna PN: 85396Ø2 - Givi TRK46N (20.7” x 16.1” x 12.2” external(?) dimensions) and Husqvarna OEM rack.

Or to get a beefier rear rack that seems to be available with the panniers.
Husqvarna PN: 8539598

Or the beefier rear rack seems to be available with the"Weekender" kit.
Husqvarna PN: 8539668

Or the Beefier rear rack seems to be available for the "Commuter" kit.
Husqvarna PN: 8539669
