Here are some optics company addresses that might be worth keeping.
Nightforce USA Performance Optics
425 656-1577 www.nightforcescopes.com
913 752-3400 www.bushnell.com
631 547-4200 www.nikonusa.com
714 994-4901 www.usoptics.com
Warne Manufacturing Company
503 657-5590 www.warnescopemounts.com
Leupold and Stevens, Inc.
503 646-9171 www.leupold.com
970 356-1670 www.burrisoptics.com
H-S Precision, Inc.
605 341-3006 www.hsprecison.com
303 799-8000 www.pentaxlightseeker.com
229 227-9053 www.weaveroptics.com
(816) 455-3704 www.badgerord.com
Tactical style (Weaver/Picatinny - dovetails with cross-slots) one and two piece tapered bases are available. Near, Badger, Leupold and a few other companies sell one piece units. H-S and Nightforce sell two-piece bases of this type (Weaver/Picatinny).
Leupold sells a tapered one piece Redfield style base (turning dovetail and opposing bolts).
Suggest that you check the Optics section for more info on the Leupold, including order number.