Yeah, if you plan on getting Ponies eventually, don't even get 10 holes or turbines in the meantime. It's just wasting money you could spend on Ponies.
Advance auto parts, go look on their website...a new MC is $40 and a rebuilt one is $25 plus a $5 core charge. I got my rebuilt town car MC (aluminum) for $25 plus the $5 core charge (since I don't have a core to turn in)