Short answer is no. (No, as in I don't know of one. Can't swear it doesn't exist) I am familiar with what bloomberg provides.
How much data do you need and what would you do with it? Do you want (like bbg provides) a list of all the deliverable issues, their basis and implied repo rates? Or do you only need the cheapest issue and it's basis? The factors are available on the CBOT website so you can construct your own spreadsheet with that data. Even bloomberg pricing data is not precise.