One of great things here at the MPI-CBG are our Service and Facilities, among them the protein expression facility (PEPC), which has been heavily used by us in recent years. In collaboration with Jeff Woodruff, a former postdoc, they developed FlexiBAC, an amazingly versatile protein expression system in insect cells, which was developed with a huge range of different constructs and tags, which might fit your needs as well.
Have a look at the original publication here. Plasmids are available at Addgene.
