Lead for Teesside 24Hr kart race

[re33]

Doing the Teesside 24hr with a team in 2 weeks but we need around 16kg of lead to cope with our variation in drivers. Teeside are charging £10 per kg!

Anyone know of somewhere else that sells 10cm circular weights with 10mm hole in it?

An extra complication is that most of team is flying over from Ireland or I would be tempted to cast my own.

Thanks