I was searching in PPM (Pure Performance Motorsport) site and found out they have a stroker kit for our cars. I don't know if it's a repost or not. It's nothing new though since the site shows they have had it since December 2011.
PPM-RACING BMW S65B40 4.7L Custom Stroker Kit:
Forged Pistons + H-Beam Connecting Rods + Billet 4340 Crankshaft Combo for BMW S65B40 V8 4.7L Stroker
PPM is proud to release the products you have all been asking for! Our new range of PPM Forged Pistons and H-Beam Connecting Rods and Billet 4340 Crankshaft are a must for your high power engine build. Specifically designed for professional racers, our Conrods & Pistons are ready to cope with the stresses of high compression, high RPM and mega boost. Our engineers have combined the highest quality alloys, the very latest forging & machining technologies. The result is best Forged Pistons + Connecting Rods and Billet 4340 Crankshaft on the market, ready for any abuse you can throw at them.
Comp ratio from: 10:1 or 11.5:1 or 12:1
This kit includes:
8x Forged Pistons, Rings, gudgeon pins, spiral locks, 2x Coatings
8x H-Beam Connecting Rods with ARP2000 Rod Bolts.
1X 84mm Stroke 4340 Billet Crankshaft
Other Strokes(82mm,83mm) also avaliable upon Request!
What's really interesting is the price, at $8,999.00 it looks like a bargain compared to what Dinan and RDSport asks. (Don't know how much VAC asks for their stroker)