I bought my oven kit five years ago, so I'm sure the prices have changed. JPY should be able to help you there.
I am not a mushroom expert, though I hope to learn as much as I can about the local varieties.
Most of the tomatoes in the picture are Maremannos. I cut them in half, poke out the seeds, and place them in a tomato mill as show below. The come out with the perfect consistency for pizza. I just add a little salt.