The price quotes from General Silicones includes a new mold for either LinnStrument models. Once you have a mold, you can reuse it for further batches of silicone playing surfaces for that specific model.
Chris over on our local Speedbump thread wants to start a campaign for crowdfunding their playing surface, but $17,500 USD is a tall order for both molds and batches. Unlike my mod, theirs is far more popular. I wish them good luck on their ambitious campaign.
The silicone playing surfaces are durable and do not require frequent replacement. Only the earliest batches have leaking silicone oil or short-lasting non-stick coatings.
There are over 4,000 combined LinnStruments sold, but you can ask Roger for further details.