I have started a project aiming to transduce some difficult-to-transduce cell types using third generation lentiviruses. As such I want to try transducing with different lentiviruses pseudotyped to other envelopes than VSV-G which is known to work poorly in our cell type.

Where is it possible to find sequence information or companies where I can order lentiviral envelopes we can use to pseudotype our viruses, particularly interesting in RD114TR, GALVTR. I have really been struggling to find just the sequence so we can generate our own plasmid, or any companies that will sell this to us. There are some plasmids on Addgene, but these are pretty limited as well.