As you may have guessed, Organic Engines is out of business. Take a trip over to Bentrider
www.bentrideronline.com where you will come across a few others who own this nearly 10 foot long tandem trike. You will have to join to use the search function since you need to be logged in to use it (it's free). Here's one that comes up
https://www.bentrideronline.com/mess...Engines+Troika.