altera_lnsim_for_vhdl.sv does not exist

I've recently installed ModelSim 10.4 and am using Quartus 13.0sp1 Web Edition to design for a system using a Cyclone III. When using ModelSim Altera-Starter NativeLink works fine. However, when setting it up for ModelSim 10.4, I get the same error as in the op in ModelSim (i.e. .../sim_lib/mentor/altera_lnsim_for_vhdl.sv does not exist.)

I've frigged the installation by creating the /mentor directory under altera/13.0sp1/quartus/eda/sim_lib and putting the version of altera_lnsim_for_vhdl.sv attached to thepancake's post in there to get past the error.

Is an official fix for this issue? Is my frigged solution is going to cause me problems in the future?

I need to use an older version of Quartus II Web-edition to support the Cyclone III devices that are being used in the design, but if installing the latest Web version and copying over some files would work I'd be prepared to do that too, though I'd prefer not to have to install a version of Quartus II that I currently cannot use because support for all the devices I design with have been removed from it!