To help you with the cost of your build, if you decide to go that route, I have some piston sets in stock, complete with rings, pins and lockers.
1 x new Arias complete forged piston set, rings, pins and lockers.
1 x pre-owned Cosworth complete forged piston set, rings, pins and lockers.
The Cosworth set have only done less than 1000 miles which were mostly running in miles and were replaced for custom made Wossner pistons.
Just drop me a PM if I can help further.
Alex.