A trampoline board. If it's a meet with an equipment company providing the equipment, the equipment company usually brings these. But per the R&P I'm pretty sure it says teams have to bring their own to be assured one (I.e. It's not required for a meet host to provide it). Now, if you're hosting a meet, and don't have one, it would be reasonable to state that in your meet information. It would also be reasonable to arrange for a gym you are friendly with that has one to bring it for general use. Pew have brought ours to meets before and of course we leave it by the vault and allow other teams to use it if they wish...some meets we don't bring one because another gym says they will bring it.
Also for Gold, the alternate apparatus is allowed but you take a SV hit. It's only allowed without SV penalty at silver and bronze. So keep that in mind, of course, if a Gold can't make it over the table safely without, my opinion is of course use it and take the lower SV, same as I feel kids shouldn't flip to their face in level 8.