The printer is found by mac os as nrg-p7527n_ps and I found a file for it, but not from nashuatec, nor ricoh..
*PPD-Adobe: "4.3"
*%
*% Printer Description file
*% for "NRG P7527n PS"
*%
*% CreationDate: 2001/06/22
*% Modified: 2009/05/04
*%
*% COPYRIGHT (C) 2001-2009 RICOH COMPANY, LTD.
*%
*% Permission is hereby granted, free of charge, to any person obtaining
*% a copy of this software and associated documentation files (the
*% "Software"), to deal in the Software without restriction, including
*% without limitation the rights to use, copy, modify, merge, publish,
*% distribute, sublicense, and/or sell copies of the Software, and to
*% permit persons to whom the Software is furnished to do so, subject to
*% the following conditions:
*%
*% The above copyright notice and this permission notice shall be
*% included in all copies or substantial portions of the Software.
*%
*% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
*% EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
*% MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
*% NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
*% LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
*% OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
*% WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*%
*% [this is the MIT open source license -- please see
www.opensource.org]
*%
*FileVersion: "1.00"
*FormatVersion: "4.3"
*LanguageEncoding: ISOLatin1
*LanguageVersion: English
*ModelName: "NRG P7527n"
*PCFileName: "NRG527N3.PPD"
*Manufacturer: "NRG"
*Product: "(NRG P7527n PS3)"
*PSVersion: "(3015.102) 2"
*ShortNickName: "NRG P7527n PS"
*NickName: "NRG P7527n PS"