Not exactly what you asked but here is a link for a list of places to send your C&R. Some offer discounts, some don't.
In case you aren't a member of surplus rifle, here is the info. RRA also offers you dealer prices with a C&R but you cannot directly purchase 01 firearms/lowers.
Here is a list of places to send your license, I copied from surplus rifle. I have had people ask me to get them guns on my license, that's a big no-no. I don't mean to preach but sooner or later they will. Good luck with your license and hold onto your wallet. I have had my license for 6+ years. Some places give you substantial discounts (Graf's).
NOTE: not all the places listed give actual discounts, some are wholesalers who sell C&R weapons, but you need to be on their list to get sales flyers, catalogs, etc..
AIM Surplus (firearms/ammo seller), 3801 Lefferson Rd, Middletown, OH 45044 (updated)
Allan's Armory, P.O. Box 331, Graham, FL 32042
Aztec International, PO Box 771569, Ocala, FL 34477-1569, (352) 629-6290 (Bit the dust?)
Brownells Inc (gun parts etc.), 200 South Front Street, Montezuma, IA 50171
Centerfire Systems, 102 Fieldview Dr, Versailles, KY 40383
Century Arms (firearms/ammo), 430 South Congress Ave, Suite 1, Delray Beach, FL 33445
Cole Distributing(firearms/ammo seller), P.O. Box 247, Scottsville, KY 42164
Empire Arms (firearms), P.O. Box 2068, Ormond Beach, FL 32175
Graf and Sons, Inc (ammo, reloading, supplies etc.), 4050 S. Clark, Mexico, MO 65265
Huntingtons(ammo, reloading), P.O. Box 991, Oroville, CA 95965
InterOrdnance DBA IO (ammo, parts, firearms, accessories),PO Box 847 Monroe NC 28111 (updated)
J&G Sales (firearms, ammo, accessories), 440 Miller Valley Rd, Prescott AZ 86301
L.C. Enterprises (firearms, ammo seller), S. 1093 Country Road G, Wonewoc, WI 53968
Midway USA (parts, ammo, reloading, books etc.), Dealer Sales, 5875 W. Van Horn Tavern Rd., Columbia, MO 65203
Military Gun Supply (firearms, ammo) 3815 East Loop 820 South, Ft. Worth, TX 76119
Numrich Gun Parts (gunparts Offers DISCOUNT), 226 Williams Lane, W. Hurley, NY 12491
Samco(firearms/ammo), 6995 NW 43rd St, Miami, FL 33166
SARCO Inc. (firearms/ammo, gunparts, accessories), P.O. Box 98, 323 Union Street, Stirling, NJ 07980
Southern Ohio Guns (SOG) (firearms/ammo), 240 Harmon Ave P.O. Box 590, Lebanon, OH 45036
TAPCO, (parts, accessories) P.O. Box 2408, Kennesaw, GA 30156
Formerly Wholesale Guns (firearms/ammo), P.O. Box 866, AQUEBOGUE, NY 11931 (address change)