We have a company that makes a 2.5" lift kit for the Scout 80/800. Cost is $750 and includes ubolts and bushings. These ship direct from the manufacturer and take 2-3 weeks to deliver. These are not available online so you will have to call if you would like to place an order. We can also offer other add-ons such as shackles and shocks.
A SOA on stock axles is a bad idea in my opinion. Add in lift springs and it will be worse. There are no hysteer kits available for the stock closed knuckle Dana 27/30 front axles so making the steering work will be a nightmare. If your skills are minimal stick with the bolt on lift kit.