Registration with INVEST DIRECT is free of charge. It gives you unlimited access to teasers of curated deals. You can then forward them to your interested clients.
We are actively working on providing ISIN for unlisted shares. This will allow them to be seamlessly integrated in your portfolios.
In any case, if your clients want to make direct investments, you would better off offering them an effective solution rather than disappointing them. You will then become their partner of choice, which could lead to a more fruitful relationship.