Is there a spider/crankset based powermeter available for a GRX RX810 2x set up? Bonus points if its on an OPEN UP frame

[Power13]

There is a whole thread on GRX PM options….

GRX Power Meter Options

I tried to order a Stages factory install, but they cancelled my order because I am in Canada. I use spd (mountain bike pedals) on this bike, and it appears that there are no options? Any suggestions would be appreciated. Not fussed about dual side, and want the best bang for buck. Thanks all! MB