FWIW, Investarms makes the Lyman GPR and TR. The "Hawkens" sold by Cabela's and Dixie Gun Works are basically the same gun as the Lyman TR, with the addition of a cap box.
As an aside, the DGW and Cabela's rifles are available in LH persuasion for us southpaws, while the Lyman TR is RH-only. The GPR is available in LH format.
If you're planning to shoot roundballs the GPR is the better choice, because it has a 1:60 twist. The TR and the Cabela's and DGW Hawkens have 1:48 twists, which are OK for balls but may shoot conicals better.