Wide gullet saddle needed...

Im now leasing a 13.3hh Brumby, But need a saddle for him, as im borrowing a friends but it is a drama if we wish to go for a ride together. Please help if you have a Wide gullet saddle please let me know. Doesn't really matter the condition, as long as still usable I don't really mind. Max I can spend is probably $150, hoping to only spend $100 or under As it will be my mum paying. Thank you

P.S. I live in the ACT, Australia