Thruxton Thruxton R 520 Front Sprocket

Anyone know where I could source a 520 Front sprocket the my Thruxton R? I think stock is 16t...

Wanting to change over to a 520.. Been looking around on the web and cant seem to find anything, I noticed some smaller models use a 520 chain but I have no idea if the output shaft is the same.

The chain obviously isn't and issue to source, nor is the rear sprocket as I have Kineo wheels and they list a 520. ..Thanks