IBS has an existing die-cut forme that I’d like to use on the ‘Plastic Class’ stock. Is this possible?

Yes.  All existing die-cut formes can be used on any of the stocks offered by IBS.  In fact, all ‘Plastic Class’ orders are die-cut, with 3mm rounded corners as standard as the corners of the polypropylene stock can be quite sharp.  If you require square corners like a standard business card, you will need to request this in your order.