Cogent Dynamics DDC fork kit comes with improved springs, converts the fork to a cartridge-esque type, and greatly improves both handling and bump tolerance. Cogent's kit comes with 0.8kg/mm springs; not strong enough for your application. Call Cogent because you have a unique weight requirement that is close to max load for the bike.
For the rear, options abound. Several shops will rebuild your rear shock to whatever spec you need and users here can tell you their luck. Many places (Race Tech, Progressive, Ohlins, Cogent, Ricor) offer rear shocks to replace the stock unit. Do note: some come with remote preload, some lack that option depending on the shock and whether the bike has ABS. Most aftermarket shocks are, far and away, better than the stock unit.
Being slow doesn't make a boring bike. I had a R1 which I thought was boring. Boring is a bike that doesn't speak to you. If you like what your bike is saying let it's voice take you to far flung places. - Vertical C