Closing the gap - self funded searchers with a "tiny" equity gap to fill

We're deep into the acquisition process on a $4.5MM tech services company.
We have a TS for 60%, plus operating funds, fees, and closing costs.
We're vetted, the business is vetted (pre-valuation), and we are ready to go to underwriting.

BUT - the seller is demanding 80% at closing and holding fast. (he's still smarting from a price plummet from $6MM)

We are interested in an equity partner(s) to help us close the deal and have a full document package for your review.

Please reply with an email address and we will follow up quickly. Thanks!