A ton of people put the Ride toe straps on their Unions. There's an entire thread full of them on EasyLoungin and they are a huge Burton/Union forum.
If you like everything else about the Unions and this is your only issue and the price of the Ride's is chump change to you... go that route.
I'm a newb, I've only rented stuff in the past. I was playing around with them last night, just opening and closing them and they seem to be sticking less. I'm still worried once they get cold and icey they'll be really sticky again. I'll report back once we get some snow I can ride.