OK, I'm not sure about this but I THINK that rosehip oil is naturally enriched with vitamin E. If you do want to use rosehip oil, I think you should go for Trilogy brand. It does cost more than the one you provided link for but it does deliver.
Trilogy Products :: certified organic rosehip oil
P.S. As per Trilogy website, this oil DOES contain vitamin E naturally. I don't think one needs to fortify it even more.