It appears to me, from the OP's comments, that primary consideration should turn to the materials used for the jig or fixture in terms of finish, strength, dimensional stability. Rather than try to reinvent the wheel, I'd turn to a 3 D printing service bureau which uses multiple printers and materials for advice. Depending on the number and variety of jigs and fixtures required, it may be more cost effective to use a service bureau rather than bring 3 D production, training, space, and material inventory in-house to just make jigs and fixtures. If required, I can point to trade magazines and journals for lists of such 3D printing service bureaus.
(The advantage of using a service with machines from different manufacturers is avoiding the "if I only have a hammer, everything looks like a nail" syndrome.)