Block on contract billing - Historical block

Dear experts,

I'd like to know if there is a way to have an "historical" block on contract for billing.

My purpose is to have something like the DFKKLOCKS for invoicing to let the contract be billed for a period, until it reaches the first block.

For example:

Contract A, block 1 for period 01/01/2014 - 31/12/9999

I'd like to bill it until 31/12/2013.

Thanks,

Fabio