LS-6 or Fast intake for LS-1

[SuperB70]

Looking for used or new LS-6, Corvette or Fast intake for LS-1.
Part numbers:
FAST:: 146302
Corvette: 88894095 ’97-’00 LS1 Corvette intake manifold. It does not have EGR, and when installed, looks identical to the LS6 intake. It also has a curved bottom—a dead giveaway that it’s an LS1 intake. PN 12557846 and PN 12556333 are also associated with this manifold.

LS6: 88894339 This part number is for the LS6 manifold found on all LS1-powered ’01 and ’02 Camaros and Firebirds, ’01-’04 Corvettes and Z06s, ’04-’05 CTS-V, and the ’04 GTO. There is an assortment of part numbers associated with this intake: 12573572, 12561184, 88890524, 88890523. 88894339. Recognized as the current factory replacement is PN 88894339.