I looked at the pics closer & even though it's supposed to be the same bike, there are two different sets of wheels on it. In the big pictures above, the wheels are black & have more than three spokes. In the picture of the bike in the turn, the wheels are red three spoke wheels. Hmmm...
I believe that the later generation CBR forks can be used, but you need to swap the triple clamps to make it happen. I think the stearing stem bearing sizes are the same, but I don't know if the stearing stem length will match the Ascot frames stearing stem height. You might have to swap stems in the triple clamps.
J.