Gimpod boards for SDA-2B blade/blade TL upgrade

I am altogether new to speaker restoration and thinking about a TL upgrade. Are Gimpod boards still available for a TL upgrade? I am having trouble contacting DHS Speaker Service and when I click to purchase boards it goes straight to Paypal. Is this how the purchase is supposed to work? Any help obtaining boards would be appreciated as well as upgrade advice for someone who knows little more about electronics than what I’ve learned on this forum in a couple hours and which end of the soldering iron to hold.