I had quite a time getting triple clamps for the forks I am using (more on that later). Everything I could find was a huge decrease in offset, or was super expensive. I tried Topar Racing, but they don't do clamps for newer bikes. Finally I found a set of stock offset Ride Engineering clamps on eBay. Unfortunately the seller made a mistake in the warehouse and sent me a set for another bike. Finally I found a guy with a set of brand new, in the box Xtrig ROCS clamps. I got them in today, and got them installed. I can't wait to see them with the forks installed.
I got in touch with Brett at ICW radiators
https://icwradiators.com/, and we discussed a plan of attack for the radiators. I am going to use the two stroke radiators, with some tank and hose modifications. I'll post more on that as I get them mocked up.
I also talked to the guy on eBay who has the kits to put 2017 KX250F plastic on your 2003-2007, and he agreed to sell me a spacer to fit my airbox. The airboot comes up about 3/4" short of connecting to the airbox front, and one of his spacers from the kit will be perfect. Plus it already has the mounting holes to the stock airbox and two stroke airboot.
That just leaves me with the kickstarter to figure out. I'm actually feeling cautiously optimistic at this point.