I have an old but functional pair of Speedplay pedals on my bike. I got them used, and I don't know what the model is. Nothing on the pedals gives me any hints. I lost one of my cycling shoes--and so also one of the cleats--at a recent race (stupid, yes, but at least I lost if after the race rather than during it). Does anyone know if the current x-series replacement cleats will work? I'm not sure whether to try to order the cleats or just order another set of pedals.