Hi Lars
Last time I worked with this, no std extractors were available and we built a custom extractor instead. It is really not that many tables you need to look into - off course depending on the requirements.
But we have made a solution for reconciliation of Local SAP FI, Central SAP FI and SAP IHC using both std FI extractor and this custom IHC extractor.
Also we made some pure IHC reporting for another client only based on a custom extractor.
Lastly I have integrated SAP IHC into SAP CM - and then used the report engine here - but the datamodel in SAP CM for IHB balances are a bit cumbersome - so dig into the details to find out if that is usuable for you.
Good luck
BR
Lone Kejser
www.1st-finance.com