This is what I've found to still be in existance. If you know of any more, please email me.
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1.  Shay #4 is currenly undergoing restoration at the El Dorado County Museum in Placerville,CA.
2.  24 foot flat car #64 is part of the SPCRR roster in Newark,CA. It is currently painted as SPC #439. Update #64 has now been repainted back into Diamond & Caldor paint and has new wheels and bearings under the original trucks.
3.  Railcar #10 Tally Ho is currently under restoration at the El Dorado County Museum in Placerville.
It was lettered for Camino, Cable and Northern. Now being restored to its original configuration.
4.  Combine 1002 is rumored to still exist. Loc and disp still unknown.
5.  Huckleberry RR has at least one Diamond & Caldor log flat.