nordictrack ankle strap

Have any nordictrack ski machine users out there seen an ankle strap
that will keep your foot securely in place? If one is not available,
I'm going to make one out of webbing and buckles. Best would be

I know there's long running debate on this, so let me just say - I use
the machine for a workout, not to simulate skiing. If you have
already learned to ski properly, I don't think it hurts technique.