Originally Posted by Captain Tenneal
Madbull makes what you're looking for. There's a larger set (which strangely is more available, even though it's custom) with a large LED scoreboard and a timer set linked up to a final popper which is available for 250 USD + Shipping from Red Wolf.
Madbull also makes another simpler set with just a small timer linked to a popper plate, but I haven't found anyone who stocks it.
Is this what you are looking for, it's the RF version made for airsoft.
This is where to find them:
Shooting Chrono Inc.
2446 Cawthra Road Building1, Unit 10
Mississauga, Ontario, Canada, L5A 3K6
Order Desk 1-800-385-3161