buy structure LE

hi there,



sorry I've ben searching a while now and can't seem to find where I can purchase Structure LE or a version for ProTools 10 - I'm running on Macos 10.6.8 -



Will structure LE let me run more than our instruments in a session?



I'm wanting to run my Logic EXS24 samples from the VSL and need to run more than the four instruments allowed under structure free.



Is this the best way?



Where can I get the license for structure LE, or a version that will work with my set up?



thanks



drew