A foam kit would be cool, or just a good source for it. I have one thought on the density. A person can pin in the radiator too tightly, over time the vibration and twist of the grille support and such could push on the traditional plastic radiator, could be sensitive to denser foam. I know on my Dads old F250 we had growing up, a large piece of 3/4 flat stock had been welded to the frame horns behind the front bumper with tow hooks on it. Dad tried all metal radiator, factory style plastic radiators, etc... and every couple years the mounting ears, and or tanks would crack and rip off that radiator in his truck. Eventually we refurbished that truck and decided to cut the tow hook piece off. The front frame horns of Ford trucks were separate clear back to a cradle under the engine for the goofy IFS brackets. By releasing that tension, we actually never lost a radiator again in that truck. Just goes to show how small changes can have an unexpected result. Perhaps the flimsy foam Toyota used was affordable, or they didn't want too much pressure on the radiator.
As for the charcoal canister, it would take a more industrious and connected person than myself, but I think a properly sized "V" clamp could be sourced that would replicate the crimped top of the factory charcoal canister. I DIY kit would have you gently grind off the crimped lip, replace pre-measured serving of charcoal, and then clamp the lid back on, maybe with a fancy rubber band under the clamp. I don't think an absolute perfect seal is needed, but then it would be serviceable again in the future. I don't have the time or connections to find the right clamp, but I'm sure one exists, similar to any v clamp used to join pipes, or like on air filter housings.
As for the charcoal canister, it would take a more industrious and connected person than myself, but I think a properly sized "V" clamp could be sourced that would replicate the crimped top of the factory charcoal canister. I DIY kit would have you gently grind off the crimped lip, replace pre-measured serving of charcoal, and then clamp the lid back on, maybe with a fancy rubber band under the clamp. I don't think an absolute perfect seal is needed, but then it would be serviceable again in the future. I don't have the time or connections to find the right clamp, but I'm sure one exists, similar to any v clamp used to join pipes, or like on air filter housings.
