Have just trial fit a Flying Ducktail out of Taiwan prior to painting in body colour. As the name suggests it replaces the top part of the current lifting spoiler on the 997.2 and lifts at speed (or could be disabled using PIWIS etc).
I quite like the slightly smaller, more subtle look and the old school 2.7 RS style vent and am also fitting a mesh grill underneath.
Also made of carbon fibre so light and strong and significantly cheaper than the RPM unit.
Details can be seen here ...
https://flyingducktail.com/ but pays to ring the owner Steve Chou and you may be able to negotiate a better price.
The tolerance on some of the mounting holes is not perfect and may require a bit of fettling as I'm doing but overall very happy with the ducktail (See photo of spoiler still in primer. Will post some photos once properly fitted and painted).