P6 EPPM: is there an option to reduce the time spent to maintain the resources pool

In P6, we manage a huge resources pool that we have to keep up to date. In order to maintain the price unit close to a real value for each group of resources, every year, we adjust the rate for the next year and the following. This mean, we have to manually change the price unit of each resource. We have around three thousands resources.

 Since we upgrade from P6 8.2 to 16.2, the SDK options are not anymore available. I was wondering if there is another option (software/app) that could reduce the time spent to maintain the resources pool.