If you are doing a demo like that I would approach the ML people with a sales proposal. Here are a couple of ideas:
1) Free set of ML for you to borrow and you get paid commission on any sales as a result
2) Reduced price set for you if you promise to demo them at y events (it would be easy if you count bigger group rides, etc).
3) Fractional cost set of ML for you as long as you spur x number of sales. If you don’t meet your quota then you pay off the balance to them for a reduced cost set.
Mention that you can give them product feedback which would be valuable to improving their products, etc.