For multisite, can CustomPress save data in a central WP database table instead of in each sub-site

In a multisite set-up, I am using CustomPress to add 2 text fields to each Page and, as per the default of CustomPress, all data is stored in sub-site postmeta tables. Is there any way to modify this location to store these two pieces of data in a central table, along with the blog_id and post_id? (I need to SELECT this data from an external db SQL VIEW and would like to avoid use of dynamic SQL if possible.)