All of CSX's SD45's were Ex.Seaboard, as Chessie had no interest in the 3600 hp giants, preferring the SD40 series (Legend has it, though, that the C&O was thinking of purchasing some). The oldest units were of ACL(!) heritage, with the youngest being the SCL's last batch. Clinchfield's was a ragtag assortment of units from the SCL. As far as I know, the L&N never owned any SD45's or SD45 variants. All the units were off the roster at the time of the Conrail Split-Up.
12 units were painted into early CSX liveries out of a fleet of 44 units. 10 units were in Seaboard System Livery, 14 in SCL original livery, and 3 in CRR/SCL "patch-jobs." All the CSX painted locomotives were in early liveries, one was in the original CSX colors, 3 more were in CSX's original livery, but they were in the variant that didn't have the words "transportation" on the long hood, 4 were in the simplified version of the original colors, and 2 were in the "stealth" scheme. The stealth is the last livery that any straight (non-dash 2) SD45's wore.
Aristo-Craft did a fairly nice representation of an SD45 in the CSX "hockey stick" livery, #8926.
http://www.aristocraft.com/catalog/loco ... %20csx.jpg Its a shame none of them were painted like that, or even into the "Dark Future" livery.