You can create them by yourself -> Just use PrimGen2, which can be found here: http://ldraw.heidemann.org/index.php?page=primgen2
I think, it is selfexplaining, if not you can read an introduction here: http://jc-tchang.philohome.com/manuel/PrimGen2.htm
/Max
I think, it is selfexplaining, if not you can read an introduction here: http://jc-tchang.philohome.com/manuel/PrimGen2.htm
/Max