Import Stock adjustments

I have a large amount of stock transactions to import, Adding to Stock or 'Writing off' as a result of stock taking. We cannot use the Stock taking facility because of it's limitations in not reading a retrospective date for the Stock level, just the system date. We have just finished compiling the results of the December stock take but production had to restart on 2nd January. In Sage 50 we could simply import them as an AI or an AO type movement as at the year end date but this facility does not appear to be available in Sage200. Why not and will it be made available in future?