iXBRL - accounts in excel

I use IRIS software so iXBRL is not a problem for all but a few of my clients. However I do have some not for profit organisations  including clubs where IRIS does not fit the requirements and is not used for the accounts production or the tax computations, I only use it for the CT600. This is where they have say bank interest or rental income that is taxable but HMRC still want full accounts and the computations show them the detail.

How do I convert the accounts and comps. so that they can be added to IRIS CT600 and submitted with the return on-line? (Currently all documents are submitted on paper). As you can imagine it's not worth manually tagging as it's not cost effective and it's also not sensible to spend a vast amount on software.

Any suggestions please?

Thanks

Steve