Those models are few and far between so you might have better luck by posting in the classifieds with a "WTB" thread. Marlin is coming out with a couple of stainless pistol grip models this year including the 1894SBL .44 mag and 1894CSBL .357 mag. These can be seen on page 12 of the new catalog here:
2011 catalog
Unfortunately either is likely to cost as much as a used 1894PG or 1894FG..

Last edited by kingstrider; 01/16/11.
Keep moving forward!