We making the switch from plastic to aluminium tubes in our timing gates. The new tubes aim to withstand our harsh Australian weather and will drastically improve gate durability, keeping them standing straight and tall even if they’ve been kept in hot sheds/cars. Existing plastic gates can easily be upgraded to the aluminium tubes too, as the pole diameters are an exact match of the plastic poles.
The price list here has the details. You would need a minimum of a basic service, to cover the labour and then then the Aluminium gate upgrade price.