Selecting an invoice theme through Stripe

Hi.

We currently take payments through Stripe and integrate this with Clearbooks. The invoices that are created on Clearbooks use our default theme.

We're now accepting payments through Stripe for a different company project and therefore the invoice theme needs to be different (the invoiced that's created on Clearbooks is made available on the clients account for download).

I can't see how to use the API to choose a different invoice theme when linking the Stripe payment to a new invoice. Can someone advise if it's possible, and if so how to do it - I can't find any info on this or anyone that seems to have the same problem.

Thanks,

Iain