What a great question. I think that Rob has put together the exhaustive list of resrouces for crowd sourcing the launch of your nonprofit. That is one fantastic idea. Here are others.
Framing the Campaign to Raise
The key difference between sourcing launch capital for a for-profit and a not-profit is the desired return.
In a for-profit the desired return is financial. there are often secondary benefits -- like ego, prestige, or access. But the deal will be evaluated in terms of financial return.
In a non-profit the desired return is . . .well, all over the map. The stated is "desire for change" The secondary benefits of ego, prestige, access or just warm-fuzzies. There are hundreds of funds and individuals who make these type of investments. Your job is to find them and "close" them -- just as you would find and close an angle investor in your business.
Where are they?
Their names are in the markeitng and development material of nonprofits: Look at the donor list on annual reports, in 990s. Find who the donors are that support causes similar to yours.
Their names are on the member directories of foundation associations: There are national , regional and sector associations. For example foundations that fund environmental causes have their own trade group. Find the ones that support your issue.
They are the clients of philentrophic advisors: many wealthy individuals and family funds contract with philanthropic advisors to support their giving. Find the ones in your area and communicate the opportunity to them directly. Here's a link to their trade group.
They are the funds managed by community foundations: In many communities there is a local community foundation. Most of these are actually made up of lots of donor advised funds. This means they manage the donations for specific donors. Find the ones in your area and communicate the opportunity-- they will connect you with a fund that might have an interest in your mission. (Here is a link to their trade group.)
Remember that you are making a B2B sales and need to have your marketing and sales material, pitch, and presentation prepared and practiced!