Small loan to close $370k gap

I bought a marketing agency using SBA three years ago after a self-funded search and recently got an LOI accepted to buy a competitor at a very good price. We've got almost all of the purchase price covered in seller's note and cash, but need $370k to close the gap. We can't easily go back to the SBA because their new rules made us ineligible (partner is a green card holder, not citizen), so we're looking for alternatives. Unfortunately, these are asset light businesses, so not many big banks are interested. We're open to just getting loans from friends and family, but figured I would post here to see if there's any other options I should explore. Thanks in advance!