The track you are after is very standard. Uses a traveller track with a four wheeled ‘car’ and a sheave at either end. Bits of ‘string’ then pull the traveller into position being cleated into jammers. The problem is the price. Check out this link
http://shop.trident-uk.com/acatalog/Wayfarer_Parts_Catalogue.html and you’ll see the price of track alone is £85!

Not sure how you’ll get around this unless you can find a knackered old hull that you can buy to remove bits like this. May be cheaper in the long run.