Welcome to the forum. Nice to see we’re attracting a global audience
Try contacting Hornblasters direct. Even if they can’t get cheaper postage they’ll generally look after forum members and might be able to cut you a better deal on the goods.
Hornstar, which is run out of the UK by a forum member here (Stinkypete), is a HB reseller so you could also check if he’s got any options or stock.