Cardboard engineer or card structural designer

I am looking for a skilled cardboard engineer or card structural designer to design displays/standees that meet our exact requirements. We have a general idea in mind but need assistance and more guidance on dimensions. As we are based in the UK, we are looking for an additional design resource to bolster what we do. This could involve up to five displays/standees initially by the right designer, with the potential for regular work depending on the quality of design.