I have the weights from the JV Kit that I never used.
xlrindustries.com
$50 shipped. Saves you $10 and saves you shipping.

TR-2 Buttstock Brass Weight Kit
This brass kit allows weight to be added to the front cavity of the new TR-2 buttstock. Adding 5.8 ounces in this location is great for countering the weight of the barrel. Allows the rear cavity to stay open for utilizing with your support hand for rear bags, and tripods.

$50 shipped. Saves you $10 and saves you shipping.