This windshield came with my RT when I purchased it used some months ago. I looks like the original owner replaced it immediately with another. The part no. on it is 705004740. I measures 25” tall at center line and 24.5” wide and still has the mounting grommets in place. Asking $140 and will include shipping to the lower 48. Other locations I will need to research.
Hope it will be a good replacement for your older weathered unit.
The part no. I listed is stamped on the edge of the windshield but I don't see that no. on the BRP website.
I can only vouch for its condition and appearance. It was not mounted on the RT when I bought it. It was in the box of goodies that was given to me.