You probably won't find one of those gems any more. Trucks I use some freestyle skateboard trucks from Gullwing. Probably any decent freestyle skateboard truck will do. Since freestyle skateboarding isn't visble any more, I doubt that you can find some freestyle trucks. You can use rollerskate wheels or skateboard wheels.
Harder wheels are faster but also more slippery.
The bigger the wheels, the faster they are. 66 mm is nice, but you can also use smaller ones. Sliders You will want to use some hard, durable plastic for sliding. Skateboard rails are quite useable. I have good experience with crow bars.