Do drop Simon a note to see if he can help you.
He will respond swiftly (asking a few clarifying questions if he needs to) and just that one contact might change everything! There's no obligation, and there'll be no hard sell. Simon will email you to explain how he might help you, and what sort of budget would be required.
“Excellent feedback - you were rated top speaker of the conference. Your topic was really well received and excellently delivered.”