Solution for not enough tomatoes

I have 13 tomato plants in my community garden. They are producing beautiful fruit (seem to be past blossom-end rot now), but slowly. My paste tomatoes are small and tasty, but I don't have enough to actually do anything with them such as can salsa or a marinara sauce. And the really big paste and beefy tomato varieties are still green and getting bigger. But we really wanted to can this weekend because we're out of town next weekend - we had the time today but the tomatoes didn't cooperate.

Then it occurred to me. There must have been someone in my community garden who, this weekend, had a lot of tomatoes and had to go out of town and was wishing his or her tomatoes had come in a week later. What if I had offered a trade - "You give me 30 pounds of tomatoes this week. I'll have enough to can and you won't have any vegetables drop on the ground while you're away. And next week, I'll give you 30 pounds from my garden."

Is this a new idea, or have I just not come across the right bunch of vegetable swapping people, website or email list?

How do you glean enough produce to put it up with tomatoes ripening at different times?

Good and tasty, but not enough to do anything with - yet.