Where to buy/order Main Bearings for FORGED (pre-76) crank?

just a follow up: king rod/main bearings are good quality. i ordered a set on ebay from "engine_kits" this seller has several sizes. i'm putting them in a 225 i'm building. i'm shooting for a h.p. per cubic inch. wish me luck.
i'll post the build specs if anyone's interested. i'd welcome any feedback.--mike