I'm not sure if a spreadsheet is best. Maybe a normal texty doc would be fine. There's a list, you write what you need, what for, who you are, when you requested it and preferably how many of the resources are currently available as well. Then other people write below your request whether they think it's ok or not and why. If nobody is against it after 24 hours, you can take it, if some people are against it after 24h, we have to vote and a majority must be for the request.
Requests are seperated by horizontal rulers or something like that.